{"id":3755,"date":"2025-10-21T16:56:41","date_gmt":"2025-10-21T13:56:41","guid":{"rendered":"https:\/\/fastpixel.io\/?p=3755"},"modified":"2025-11-06T14:41:02","modified_gmt":"2025-11-06T12:41:02","slug":"guide-to-core-web-vitals","status":"publish","type":"post","link":"https:\/\/fastpixel.io\/fr\/blog\/guide-to-core-web-vitals\/","title":{"rendered":"Guide to Core Web Vitals: What Every Website Owner Needs to Know"},"content":{"rendered":"<p>If you own a website, you&#8217;ve probably heard about Core Web Vitals. <\/p>\n\n\n\n<p>But what exactly are they, and why should you care? Let&#8217;s break it down in simple terms, no technical background required.<\/p>\n\n\n\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_82_2 counter-hierarchy ez-toc-counter ez-toc-custom ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #000000;color:#000000\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #000000;color:#000000\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewbox=\"0 0 24 24\" version=\"1.2\" baseprofile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/fastpixel.io\/fr\/blog\/guide-to-core-web-vitals\/#what-are-core-web-vitals\" >What are Core Web Vitals?<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/fastpixel.io\/fr\/blog\/guide-to-core-web-vitals\/#1-loading-speed-lcp-%e2%80%93-largest-contentful-paint\" >1. Loading speed (LCP \u2013 Largest Contentful Paint)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/fastpixel.io\/fr\/blog\/guide-to-core-web-vitals\/#2-interactivity-inp-%e2%80%93-interaction-to-next-paint\" >2. Interactivity (INP \u2013 Interaction to Next Paint)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/fastpixel.io\/fr\/blog\/guide-to-core-web-vitals\/#3-visual-stability-cls-%e2%80%93-cumulative-layout-shift\" >3. Visual stability (CLS \u2013 Cumulative Layout Shift)<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/fastpixel.io\/fr\/blog\/guide-to-core-web-vitals\/#why-core-web-vitals-really-matter\" >Why Core Web Vitals really matter?<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/fastpixel.io\/fr\/blog\/guide-to-core-web-vitals\/#better-user-experience\" >Better user experience<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/fastpixel.io\/fr\/blog\/guide-to-core-web-vitals\/#higher-google-rankings\" >Higher Google rankings<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/fastpixel.io\/fr\/blog\/guide-to-core-web-vitals\/#better-business-results\" >Better business results<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/fastpixel.io\/fr\/blog\/guide-to-core-web-vitals\/#using-wordpress-and-want-to-improve-your-core-web-vitals\" >Using WordPress and want to improve your Core Web Vitals?<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/fastpixel.io\/fr\/blog\/guide-to-core-web-vitals\/#understanding-the-metrics-in-depth\" >Understanding the metrics in depth<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/fastpixel.io\/fr\/blog\/guide-to-core-web-vitals\/#what-makes-core-web-vitals-different\" >What makes Core Web Vitals different?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/fastpixel.io\/fr\/blog\/guide-to-core-web-vitals\/#the-evolution-of-core-web-vitals\" >The evolution of Core Web Vitals<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/fastpixel.io\/fr\/blog\/guide-to-core-web-vitals\/#how-the-metrics-are-measured\" >How the metrics are measured<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/fastpixel.io\/fr\/blog\/guide-to-core-web-vitals\/#how-to-check-your-core-web-vitals\" >How to check your Core Web Vitals<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/fastpixel.io\/fr\/blog\/guide-to-core-web-vitals\/#google-pagespeed-insights\" >Google PageSpeed Insights<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"https:\/\/fastpixel.io\/fr\/blog\/guide-to-core-web-vitals\/#google-search-console\" >Google Search Console<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-17\" href=\"https:\/\/fastpixel.io\/fr\/blog\/guide-to-core-web-vitals\/#chrome-devtools\" >Chrome DevTools<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-18\" href=\"https:\/\/fastpixel.io\/fr\/blog\/guide-to-core-web-vitals\/#supercharge-your-site-with-fastpixel\" >Supercharge your site with FastPixel<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-19\" href=\"https:\/\/fastpixel.io\/fr\/blog\/guide-to-core-web-vitals\/#common-myths-and-misconceptions\" >Common myths and misconceptions<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-20\" href=\"https:\/\/fastpixel.io\/fr\/blog\/guide-to-core-web-vitals\/#%e2%80%9ccore-web-vitals-are-just-for-technical-people%e2%80%9d\" >&#8220;Core Web Vitals are just for technical people&#8221;<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-21\" href=\"https:\/\/fastpixel.io\/fr\/blog\/guide-to-core-web-vitals\/#%e2%80%9cperfect-scores-dont-matter%e2%80%9d\" >&#8220;Perfect scores don&#8217;t matter&#8221;<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-22\" href=\"https:\/\/fastpixel.io\/fr\/blog\/guide-to-core-web-vitals\/#%e2%80%9ccore-web-vitals-only-matter-for-big-websites%e2%80%9d\" >&#8220;Core Web Vitals only matter for big websites&#8221;<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-23\" href=\"https:\/\/fastpixel.io\/fr\/blog\/guide-to-core-web-vitals\/#%e2%80%9conce-optimized-youre-done-forever%e2%80%9d\" >&#8220;Once optimized, you&#8217;re done forever&#8221;<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-24\" href=\"https:\/\/fastpixel.io\/fr\/blog\/guide-to-core-web-vitals\/#%e2%80%9cmobile-and-desktop-are-the-same%e2%80%9d\" >&#8220;Mobile and desktop are the same&#8221;<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-25\" href=\"https:\/\/fastpixel.io\/fr\/blog\/guide-to-core-web-vitals\/#optimization-meets-results\" >Optimization meets results<\/a><\/li><\/ul><\/nav><\/div>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"what-are-core-web-vitals\"><\/span>What are Core Web Vitals?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p><strong>Think of <a href=\"https:\/\/developers.google.com\/search\/docs\/appearance\/core-web-vitals\" data-type=\"link\" data-id=\"https:\/\/developers.google.com\/search\/docs\/appearance\/core-web-vitals\">Core Web Vitals<\/a> as a health check<\/strong> for your website, similar to how a doctor measures your blood pressure, heart rate, and temperature to assess your overall health. They&#8217;re measurements that tell you how comfortable and fast your website feels to visitors.<\/p>\n\n\n\n<p>Google introduced Core Web Vitals in 2020 as part of their &#8220;page experience&#8221; initiative. The goal was simple: create clear, standardized metrics that website owners could use to understand what really matters to users when they browse the web. Before this, there were dozens of performance metrics, and it wasn&#8217;t always clear which ones to focus on.<\/p>\n\n\n\n<p>Core Web Vitals focus on three specific things people notice when they visit your site:<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"1-loading-speed-lcp-%e2%80%93-largest-contentful-paint\"><\/span><strong>1. Loading speed (<a href=\"https:\/\/fastpixel.io\/fr\/blog\/largest-contentful-paint-explained\/\" data-type=\"link\" data-id=\"https:\/\/fastpixel.io\/blog\/largest-contentful-paint-explained\/\">LCP \u2013 Largest Contentful Paint<\/a>)<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"516\" height=\"463\" src=\"https:\/\/fastpixel.io\/wp-content\/uploads\/2025\/10\/largest-contentful-paint.png\" alt=\"\" class=\"wp-image-3781\" srcset=\"https:\/\/fastpixel.io\/wp-content\/uploads\/2025\/10\/largest-contentful-paint.png 516w, https:\/\/fastpixel.io\/wp-content\/uploads\/2025\/10\/largest-contentful-paint-300x269.png 300w, https:\/\/fastpixel.io\/wp-content\/uploads\/2025\/10\/largest-contentful-paint-13x12.png 13w, https:\/\/fastpixel.io\/wp-content\/uploads\/2025\/10\/largest-contentful-paint-360x323.png 360w\" sizes=\"(max-width: 516px) 100vw, 516px\" \/><\/figure>\n\n\n\n<p>This measures how fast the most important part of the page shows up; kind of like the front page headline or big photo you see first when you open a newspaper. It\u2019s the main thing that grabs your attention right away.<\/p>\n\n\n\n<p><em>What&#8217;s a good score?<\/em> Your LCP should happen within 2.5 seconds of when the page starts loading. Between 2.5-4 seconds needs improvement, and anything over 4 seconds is considered poor.<\/p>\n\n\n\n<p>Think of it like ordering food at a restaurant. LCP is the time between sitting down and seeing your meal arrive. If you wait 10 minutes, you&#8217;ll be frustrated, but if it arrives in 2 minutes, you&#8217;re happy!<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"2-interactivity-inp-%e2%80%93-interaction-to-next-paint\"><\/span><strong>2. Interactivity (<a href=\"https:\/\/fastpixel.io\/fr\/blog\/interaction-to-next-paint-inp-explained\/\" data-type=\"link\" data-id=\"https:\/\/fastpixel.io\/blog\/interaction-to-next-paint-inp-explained\/\">INP \u2013 Interaction to Next Paint<\/a>)<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"516\" height=\"463\" src=\"https:\/\/fastpixel.io\/wp-content\/uploads\/2025\/10\/interaction-to-next-paint.png\" alt=\"\" class=\"wp-image-3790\" srcset=\"https:\/\/fastpixel.io\/wp-content\/uploads\/2025\/10\/interaction-to-next-paint.png 516w, https:\/\/fastpixel.io\/wp-content\/uploads\/2025\/10\/interaction-to-next-paint-300x269.png 300w, https:\/\/fastpixel.io\/wp-content\/uploads\/2025\/10\/interaction-to-next-paint-13x12.png 13w, https:\/\/fastpixel.io\/wp-content\/uploads\/2025\/10\/interaction-to-next-paint-360x323.png 360w\" sizes=\"(max-width: 516px) 100vw, 516px\" \/><\/figure>\n\n\n\n<p>This tracks how fast your website reacts when someone clicks a button, taps a link, or types in a form. It replaced an older metric called FID (First Input Delay) in March 2024 because INP gives a more complete picture of responsiveness throughout the entire visit, not just the first interaction.<\/p>\n\n\n\n<p><em>What&#8217;s a good score?<\/em> Your INP should be under 200 milliseconds. Between 200-500 milliseconds needs improvement, and anything over 500 milliseconds is poor.<\/p>\n\n\n\n<p>Imagine pressing an elevator button. If the light responds immediately, you know it registered. If nothing happens for a second, you&#8217;ll press it again (and again), getting increasingly frustrated. That&#8217;s what poor INP feels like.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"3-visual-stability-cls-%e2%80%93-cumulative-layout-shift\"><\/span><strong>3. Visual stability (<a href=\"https:\/\/fastpixel.io\/fr\/blog\/understanding-cls-cumulative-layout-shift-why-stable-layouts-matter-for-your-visitors\/\" data-type=\"link\" data-id=\"https:\/\/fastpixel.io\/blog\/understanding-cls-cumulative-layout-shift-why-stable-layouts-matter-for-your-visitors\/\">CLS \u2013 Cumulative Layout Shift<\/a>)<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"516\" height=\"463\" src=\"https:\/\/fastpixel.io\/wp-content\/uploads\/2025\/10\/cumulative-layout-shift.png\" alt=\"\" class=\"wp-image-3785\" srcset=\"https:\/\/fastpixel.io\/wp-content\/uploads\/2025\/10\/cumulative-layout-shift.png 516w, https:\/\/fastpixel.io\/wp-content\/uploads\/2025\/10\/cumulative-layout-shift-300x269.png 300w, https:\/\/fastpixel.io\/wp-content\/uploads\/2025\/10\/cumulative-layout-shift-13x12.png 13w, https:\/\/fastpixel.io\/wp-content\/uploads\/2025\/10\/cumulative-layout-shift-360x323.png 360w\" sizes=\"(max-width: 516px) 100vw, 516px\" \/><\/figure>\n\n\n\n<p>This measures whether things jump around on the page while it&#8217;s loading. You know that frustrating moment when you&#8217;re about to click a &#8220;Read More&#8221; button and suddenly an ad loads above it, pushing everything down? You accidentally click the ad instead. That&#8217;s a layout shift, and CLS measures how much this happens.<\/p>\n\n\n\n<p><em>What&#8217;s a good score?<\/em> Your CLS should be under 0.1. Between 0.1-0.25 needs improvement, and anything over 0.25 is poor. (This is a unitless score that represents how much of the screen shifted.)<\/p>\n\n\n\n<p>It&#8217;s like trying to read a book where the words keep rearranging themselves. Annoying and unprofessional.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"why-core-web-vitals-really-matter\"><\/span>Why Core Web Vitals really matter?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>These metrics aren&#8217;t just technical jargon. They directly affect your success online in three critical ways.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"better-user-experience\"><\/span>Better user experience<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>When a site loads quickly (good LCP), responds smoothly (good INP), and doesn&#8217;t shift around (good CLS), people feel it&#8217;s professional and trustworthy. This keeps them engaged longer, which means they&#8217;re more likely to read your content, buy your products, or sign up for your services.<\/p>\n\n\n\n<p>Research shows that <a href=\"https:\/\/www.thinkwithgoogle.com\/intl\/en-emea\/marketing-strategies\/app-and-mobile\/website-user-experience-how-convert-customers-and-get-them-visit-again\/\" data-type=\"link\" data-id=\"https:\/\/www.thinkwithgoogle.com\/intl\/en-emea\/marketing-strategies\/app-and-mobile\/website-user-experience-how-convert-customers-and-get-them-visit-again\/\">88% of online consumers are less likely to return<\/a> to a site after a bad experience. First impressions happen in about 50 milliseconds, and Core Web Vitals directly shape that impression.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"higher-google-rankings\"><\/span>Higher Google rankings<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Google officially added Core Web Vitals to its ranking factors in June 2021 as part of the <a href=\"https:\/\/nitropack.io\/blog\/post\/google-page-experience\" data-type=\"link\" data-id=\"https:\/\/nitropack.io\/blog\/post\/google-page-experience\" target=\"_blank\" rel=\"noreferrer noopener\">Page Experience<\/a> update. While they&#8217;re not the most important ranking factor (content quality and relevance still matter most), they act as a tiebreaker. If two websites have similar content, the one with better Core Web Vitals will likely rank higher.<\/p>\n\n\n\n<p>Google&#8217;s John Mueller has clarified that Core Web Vitals are &#8220;a light ranking factor&#8221; but emphasized they&#8217;re still important because they directly affect whether users engage with your content.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"better-business-results\"><\/span>Better business results<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>A faster, smoother website builds trust, creates engagement, and often generates more conversions (sales, sign-ups, downloads). The numbers tell the story:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>According to Google&#8217;s research, as page load time goes from 1 second to 5 seconds, the probability of someone leaving (bounce rate) increases by 90%<\/li>\n\n\n\n<li>The bounce probability <a href=\"https:\/\/www.thinkwithgoogle.com\/marketing-strategies\/app-and-mobile\/page-load-time-statistics\/\" data-type=\"link\" data-id=\"https:\/\/www.thinkwithgoogle.com\/marketing-strategies\/app-and-mobile\/page-load-time-statistics\/\" target=\"_blank\" rel=\"noreferrer noopener\">increases 32% as page load time goes from 1 second to 3 seconds<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/oddballmarketing.com.au\/blog\/47-of-consumers-expect-web-pages-to-load-in\/\" data-type=\"link\" data-id=\"https:\/\/oddballmarketing.com.au\/blog\/47-of-consumers-expect-web-pages-to-load-in\/\">47% of customers expect a webpage to load i<\/a><a href=\"https:\/\/oddballmarketing.com.au\/blog\/47-of-consumers-expect-web-pages-to-load-in\/\" data-type=\"link\" data-id=\"https:\/\/oddballmarketing.com.au\/blog\/47-of-consumers-expect-web-pages-to-load-in\/\" target=\"_blank\" rel=\"noreferrer noopener\">n<\/a><a href=\"https:\/\/oddballmarketing.com.au\/blog\/47-of-consumers-expect-web-pages-to-load-in\/\" data-type=\"link\" data-id=\"https:\/\/oddballmarketing.com.au\/blog\/47-of-consumers-expect-web-pages-to-load-in\/\"> 2 seconds<\/a> or less<\/li>\n\n\n\n<li>Amazon found that <a href=\"https:\/\/www.gigaspaces.com\/blog\/amazon-found-every-100ms-of-latency-cost-them-1-in-sales\" data-type=\"link\" data-id=\"https:\/\/www.gigaspaces.com\/blog\/amazon-found-every-100ms-of-latency-cost-them-1-in-sales\" target=\"_blank\" rel=\"noreferrer noopener\">every 100ms of latency cost them 1% in sales<\/a><\/li>\n\n\n\n<li>The BBC discovered that they <a href=\"https:\/\/www.creativebloq.com\/features\/how-the-bbc-builds-websites-that-scale\" data-type=\"link\" data-id=\"https:\/\/www.creativebloq.com\/features\/how-the-bbc-builds-websites-that-scale\" target=\"_blank\" rel=\"noreferrer noopener\">lost an additional 10% of users<\/a> for every additional second their site took to load<\/li>\n<\/ul>\n\n\n\n<div class=\"wp-block-group has-border-color has-palette-color-4-border-color has-palette-color-6-background-color has-background is-vertical is-content-justification-left is-layout-flex wp-container-core-group-is-layout-e21fc307 wp-block-group-is-layout-flex\" style=\"border-width:1px;border-radius:20px;margin-top:var(--wp--preset--spacing--60);margin-bottom:var(--wp--preset--spacing--60);padding-top:var(--wp--preset--spacing--60);padding-right:var(--wp--preset--spacing--60);padding-bottom:var(--wp--preset--spacing--60);padding-left:var(--wp--preset--spacing--60)\">\n<h3 class=\"wp-block-heading\" style=\"margin-top:0;margin-right:0;margin-bottom:0;margin-left:0;padding-top:0;padding-right:0;padding-bottom:0;padding-left:0\"><span class=\"ez-toc-section\" id=\"using-wordpress-and-want-to-improve-your-core-web-vitals\"><\/span>Using WordPress and want to improve your Core Web Vitals?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Try FastPixel to boost the performance of your website.<\/p>\n\n\n\n<div class=\"wp-block-buttons is-layout-flex wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button\"><a class=\"wp-block-button__link wp-element-button\" href=\"https:\/\/wordpress.org\/plugins\/fastpixel-website-accelerator\/\" target=\"_blank\" rel=\"noreferrer noopener\">Commencer<\/a><\/div>\n<\/div>\n<\/div>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"understanding-the-metrics-in-depth\"><\/span>Understanding the metrics in depth<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"what-makes-core-web-vitals-different\"><\/span>What makes Core Web Vitals different?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Previous performance metrics often measured technical aspects that didn&#8217;t directly correlate with user experience. <\/p>\n\n\n\n<p>For example, the old &#8220;load time&#8221; metric measured when every last resource finished downloading, even if the page appeared complete to users much earlier.<\/p>\n\n\n\n<p>Core Web Vitals take a different approach: they measure what users actually perceive and experience. Each metric captures a specific moment or aspect of the user journey:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>LCP<\/strong> captures the &#8220;it&#8217;s here!&#8221; moment when the main content appears<\/li>\n\n\n\n<li><strong>INP<\/strong> captures the &#8220;it works!&#8221; feeling when interactions respond immediately<\/li>\n\n\n\n<li><strong>CLS<\/strong> captures the &#8220;it&#8217;s stable!&#8221; confidence that elements won&#8217;t move unexpectedly<\/li>\n<\/ul>\n\n\n\n<p>This user-centric approach is why these metrics matter so much. <\/p>\n\n\n\n<p>They&#8217;re not arbitrary technical benchmarks;<strong> they&#8217;re measurements of real frustration points <\/strong>that make people abandon websites.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"the-evolution-of-core-web-vitals\"><\/span>The evolution of Core Web Vitals<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Google didn&#8217;t just invent these metrics overnight. They evolved from years of research and earlier attempts:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>LCP<\/strong> replaced older metrics like First Contentful Paint (FCP) and First Meaningful Paint (FMP), which didn&#8217;t always match what users actually saw as &#8220;loaded&#8221;<\/li>\n\n\n\n<li><strong>INP<\/strong> replaced First Input Delay (FID) in March 2024 because FID only measured the first interaction, missing subsequent slowness<\/li>\n\n\n\n<li><strong>CLS<\/strong> was entirely new, addressing a frustration that had no previous standardized measurement<\/li>\n<\/ul>\n\n\n\n<p>Google continues to refine these metrics based on real-world data. They&#8217;re not set in stone forever. This is why staying informed about Core Web Vitals is an ongoing process, not a one-time task.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"how-the-metrics-are-measured\"><\/span>How the metrics are measured<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Google uses two types of data to evaluate Core Web Vitals:<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"1024\" height=\"498\" src=\"https:\/\/fastpixel.io\/wp-content\/uploads\/2025\/10\/lab-vs-field-data.png\" alt=\"\" class=\"wp-image-3883\" srcset=\"https:\/\/fastpixel.io\/wp-content\/uploads\/2025\/10\/lab-vs-field-data.png 1024w, https:\/\/fastpixel.io\/wp-content\/uploads\/2025\/10\/lab-vs-field-data-300x146.png 300w, https:\/\/fastpixel.io\/wp-content\/uploads\/2025\/10\/lab-vs-field-data-768x374.png 768w, https:\/\/fastpixel.io\/wp-content\/uploads\/2025\/10\/lab-vs-field-data-18x9.png 18w, https:\/\/fastpixel.io\/wp-content\/uploads\/2025\/10\/lab-vs-field-data-360x175.png 360w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p><strong>Lab Data (Synthetic Testing)<\/strong><\/p>\n\n\n\n<p>This comes from tools like PageSpeed Insights and Lighthouse, which simulate page loads in controlled environments. It&#8217;s useful for debugging because it&#8217;s consistent and immediate, but it doesn&#8217;t reflect real user conditions like varying network speeds, devices, and usage patterns.<\/p>\n\n\n\n<p><strong>Field Data (Real User Monitoring)<\/strong><\/p>\n\n\n\n<p>This comes from actual Chrome browser users visiting your site (Chrome User Experience Report or CrUX). It reflects real-world conditions but takes time to accumulate. Google uses this data for search rankings because it represents actual user experience.<\/p>\n\n\n\n<p>The key insight: you need both. Lab data helps you identify and fix problems during development. Field data tells you how your site performs for real users and affects your search rankings.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"how-to-check-your-core-web-vitals\"><\/span>How to check your Core Web Vitals<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>You don&#8217;t need to guess whether your site is performing well. Use these free tools:<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"google-pagespeed-insights\"><\/span><strong><a href=\"https:\/\/pagespeed.web.dev\/\" data-type=\"link\" data-id=\"https:\/\/pagespeed.web.dev\/\">Google PageSpeed Insights<\/a><\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p><strong>Best for:<\/strong> Quick overview and specific recommendations<br><strong>How to use:<\/strong> Enter your URL at <a href=\"https:\/\/pagespeed.web.dev\">pagespeed.web.dev<\/a><\/p>\n\n\n\n<p>You&#8217;ll get:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Scores for all three Core Web Vitals<\/li>\n\n\n\n<li>Both lab data (simulated test) and field data (real users)<\/li>\n\n\n\n<li>Specific recommendations for improvement<\/li>\n\n\n\n<li>Mobile and desktop performance separately<\/li>\n<\/ul>\n\n\n\n<p>PageSpeed Insights uses Lighthouse for lab testing and pulls CrUX data for field metrics. The tool provides color-coded scores (green = good, orange = needs improvement, red = poor) and prioritizes suggestions based on potential impact.<\/p>\n\n\n\n<p><strong>Pro tip:<\/strong> Always check mobile performance first. Over 60% of web traffic globally comes from mobile devices, and mobile connections are typically slower than desktop, making optimization even more critical.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"google-search-console\"><\/span><strong><a href=\"https:\/\/search.google.com\/search-console\/about\" data-type=\"link\" data-id=\"https:\/\/search.google.com\/search-console\/about\" target=\"_blank\" rel=\"noreferrer noopener\">Google Search Console<\/a><\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p><strong>Best for:<\/strong> Monitoring all your pages over time<br><strong>How to use:<\/strong> Verify your site with Google Search Console and check the Core Web Vitals report<\/p>\n\n\n\n<p>You&#8217;ll see:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>How all your pages perform, grouped by URL patterns<\/li>\n\n\n\n<li>Performance categories (good, needs improvement, poor)<\/li>\n\n\n\n<li>Trends over time as you make improvements<\/li>\n\n\n\n<li>Real user data from Chrome browsers<\/li>\n<\/ul>\n\n\n\n<p>Search Console is invaluable because it shows you which page templates or sections need work. For example, you might discover that your product pages perform well, but your blog posts have poor LCP. This helps you prioritize optimization efforts.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"chrome-devtools\"><\/span><strong><a href=\"https:\/\/developer.chrome.com\/docs\/devtools\" data-type=\"link\" data-id=\"https:\/\/developer.chrome.com\/docs\/devtools\">Chrome DevTools<\/a><\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p><strong>Best for:<\/strong> Deep technical debugging<br><strong>How to use:<\/strong> Open your site in Chrome, press F12, and explore the Performance and Network tabs<\/p>\n\n\n\n<p>This is more technical but provides detailed information:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Exactly what resources are loading and when<\/li>\n\n\n\n<li>Which scripts are blocking rendering<\/li>\n\n\n\n<li>Precise timing breakdowns<\/li>\n\n\n\n<li>Network waterfall charts<\/li>\n<\/ul>\n\n\n\n<p>DevTools is like looking under the hood of a car. It&#8217;s not necessary for basic optimization, but when you need to understand exactly why something is slow, it&#8217;s indispensable.<\/p>\n\n\n\n<div class=\"wp-block-group has-border-color has-palette-color-4-border-color has-palette-color-6-background-color has-background is-vertical is-content-justification-left is-layout-flex wp-container-core-group-is-layout-e21fc307 wp-block-group-is-layout-flex\" style=\"border-width:1px;border-radius:20px;margin-top:var(--wp--preset--spacing--60);margin-bottom:var(--wp--preset--spacing--60);padding-top:var(--wp--preset--spacing--60);padding-right:var(--wp--preset--spacing--60);padding-bottom:var(--wp--preset--spacing--60);padding-left:var(--wp--preset--spacing--60)\">\n<h3 class=\"wp-block-heading\" style=\"margin-top:0;margin-right:0;margin-bottom:0;margin-left:0;padding-top:0;padding-right:0;padding-bottom:0;padding-left:0\"><span class=\"ez-toc-section\" id=\"supercharge-your-site-with-fastpixel\"><\/span>Supercharge your site with FastPixel<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Optimize loading times, enhance user experience, and give your website the performance edge it needs.<\/p>\n\n\n\n<div class=\"wp-block-buttons is-layout-flex wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button\"><a class=\"wp-block-button__link wp-element-button\" href=\"https:\/\/wordpress.org\/plugins\/fastpixel-website-accelerator\/\" target=\"_blank\" rel=\"noreferrer noopener\">Commencer<\/a><\/div>\n<\/div>\n<\/div>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"common-myths-and-misconceptions\"><\/span>Common myths and misconceptions<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%e2%80%9ccore-web-vitals-are-just-for-technical-people%e2%80%9d\"><\/span>&#8220;Core Web Vitals are just for technical people&#8221;<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-palette-color-1-color\">False.<\/mark> <\/strong>While implementation may involve technical work, understanding what matters and why is straightforward. Many optimization tools (like FastPixel on WordPress) automate the technical parts.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%e2%80%9cperfect-scores-dont-matter%e2%80%9d\"><\/span>&#8220;Perfect scores don&#8217;t matter&#8221;<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p><strong><mark style=\"background-color:rgba(0, 0, 0, 0);color:#00d084\" class=\"has-inline-color\">Partially true.<\/mark> <\/strong>Obsessing over a 100\/100 score isn&#8217;t necessary, but there&#8217;s a big difference between a 40 and an 85. The goal is passing thresholds (good vs needs improvement), not perfection.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%e2%80%9ccore-web-vitals-only-matter-for-big-websites%e2%80%9d\"><\/span>&#8220;Core Web Vitals only matter for big websites&#8221;<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-palette-color-1-color\"><strong>False.<\/strong> <\/mark>Small businesses and blogs benefit just as much, if not more. If you&#8217;re competing with limited marketing budgets, good Core Web Vitals give you an edge over competitors who neglect them.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%e2%80%9conce-optimized-youre-done-forever%e2%80%9d\"><\/span>&#8220;Once optimized, you&#8217;re done forever&#8221;<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-palette-color-1-color\">False.<\/mark> <\/strong>Websites evolve, you add content, plugins, features, and so on. Regular monitoring ensures new additions don&#8217;t degrade performance. Quarterly checks are a good baseline.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%e2%80%9cmobile-and-desktop-are-the-same%e2%80%9d\"><\/span>&#8220;Mobile and desktop are the same&#8221;<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-palette-color-1-color\">False.<\/mark><\/strong> Mobile devices have slower processors, smaller screens, and often slower connections. Mobile optimization requires specific attention, and most of your traffic is probably mobile.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"optimization-meets-results\"><\/span>Optimization meets results<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Understanding the theory is important, but seeing real results drives home why this matters:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><a href=\"https:\/\/web.dev\/case-studies\/rakuten\" data-type=\"link\" data-id=\"https:\/\/web.dev\/case-studies\/rakuten\">Rakuten 24&#8217;s A\/B testing<\/a> showed dramatic improvements including <strong>53.37% increase in revenue<\/strong> per visitor and <strong>33.13% increase in conversion rate<\/strong><\/li>\n\n\n\n<li><a href=\"https:\/\/www.rumvision.com\/blog\/benefits-of-optimizing-core-web-vitals\/\" data-type=\"link\" data-id=\"https:\/\/www.rumvision.com\/blog\/benefits-of-optimizing-core-web-vitals\/\">Carpe improved LCP by 52% and CLS by 41%<\/a>, resulting in <strong>10% more traffic and 15% revenue increase<\/strong><\/li>\n\n\n\n<li><a href=\"https:\/\/www.rumvision.com\/blog\/benefits-of-optimizing-core-web-vitals\/\" data-type=\"link\" data-id=\"https:\/\/www.rumvision.com\/blog\/benefits-of-optimizing-core-web-vitals\/\">Swappie saw<\/a> <strong>mobile conversion rates increase by 101.47%<\/strong> on product pages<\/li>\n\n\n\n<li><a href=\"https:\/\/wpostats.com\/tags\/core%20web%20vitals\/\" data-type=\"link\" data-id=\"https:\/\/wpostats.com\/tags\/core%20web%20vitals\/\">Groupe Renault found<\/a> that a <strong>1-second LCP improvement<\/strong> led to a <strong>14 percentage point decrease in bounce rate and 13% increase in conversions<\/strong><\/li>\n\n\n\n<li><a href=\"https:\/\/web.dev\/case-studies\/vitals-business-impact\" data-type=\"link\" data-id=\"https:\/\/web.dev\/case-studies\/vitals-business-impact\">Additional examples <\/a>include Flipkart&#8217;s<strong> 2.6% bounce rate reduction<\/strong>, Nykaa&#8217;s <strong>28% organic traffic increase<\/strong>, Tencent Video&#8217;s <strong>70% better CTR<\/strong>, and Cdiscount&#8217;s<strong> 6% revenue uplift<\/strong><\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"<p>If you own a website, you&#8217;ve probably heard about Core Web Vitals. But what exactly are they, and why should you care? Let&#8217;s break it down in simple terms, no technical background required. What are Core Web Vitals? Think of Core Web Vitals as a health check for your website, similar to how a doctor [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":3762,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_uag_custom_page_level_css":"","footnotes":""},"categories":[10],"tags":[],"class_list":["post-3755","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-website-optimization"],"blocksy_meta":[],"uagb_featured_image_src":{"full":["https:\/\/fastpixel.io\/wp-content\/uploads\/2025\/10\/core-web-vitals-optimization.png",1000,612,false],"thumbnail":["https:\/\/fastpixel.io\/wp-content\/uploads\/2025\/10\/core-web-vitals-optimization-150x150.png",150,150,true],"medium":["https:\/\/fastpixel.io\/wp-content\/uploads\/2025\/10\/core-web-vitals-optimization-300x184.png",300,184,true],"medium_large":["https:\/\/fastpixel.io\/wp-content\/uploads\/2025\/10\/core-web-vitals-optimization-768x470.png",768,470,true],"large":["https:\/\/fastpixel.io\/wp-content\/uploads\/2025\/10\/core-web-vitals-optimization.png",1000,612,false],"1536x1536":["https:\/\/fastpixel.io\/wp-content\/uploads\/2025\/10\/core-web-vitals-optimization.png",1000,612,false],"2048x2048":["https:\/\/fastpixel.io\/wp-content\/uploads\/2025\/10\/core-web-vitals-optimization.png",1000,612,false],"trp-custom-language-flag":["https:\/\/fastpixel.io\/wp-content\/uploads\/2025\/10\/core-web-vitals-optimization-18x12.png",18,12,true],"betterdocs-category-thumb":["https:\/\/fastpixel.io\/wp-content\/uploads\/2025\/10\/core-web-vitals-optimization-360x220.png",360,220,true]},"uagb_author_info":{"display_name":"Andrei Alba","author_link":"https:\/\/fastpixel.io\/fr\/blog\/author\/andreialba\/"},"uagb_comment_info":0,"uagb_excerpt":"If you own a website, you&#8217;ve probably heard about Core Web Vitals. But what exactly are they, and why should you care? Let&#8217;s break it down in simple terms, no technical background required. What are Core Web Vitals? Think of Core Web Vitals as a health check for your website, similar to how a doctor\u2026","_links":{"self":[{"href":"https:\/\/fastpixel.io\/fr\/wp-json\/wp\/v2\/posts\/3755","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/fastpixel.io\/fr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/fastpixel.io\/fr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/fastpixel.io\/fr\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/fastpixel.io\/fr\/wp-json\/wp\/v2\/comments?post=3755"}],"version-history":[{"count":43,"href":"https:\/\/fastpixel.io\/fr\/wp-json\/wp\/v2\/posts\/3755\/revisions"}],"predecessor-version":[{"id":4024,"href":"https:\/\/fastpixel.io\/fr\/wp-json\/wp\/v2\/posts\/3755\/revisions\/4024"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/fastpixel.io\/fr\/wp-json\/wp\/v2\/media\/3762"}],"wp:attachment":[{"href":"https:\/\/fastpixel.io\/fr\/wp-json\/wp\/v2\/media?parent=3755"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fastpixel.io\/fr\/wp-json\/wp\/v2\/categories?post=3755"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fastpixel.io\/fr\/wp-json\/wp\/v2\/tags?post=3755"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}