{"id":28786,"date":"2021-02-19T13:52:15","date_gmt":"2021-02-19T19:52:15","guid":{"rendered":"https:\/\/www.mediavine.com\/?p=28786"},"modified":"2021-02-19T13:52:16","modified_gmt":"2021-02-19T19:52:16","slug":"google-announces-core-web-vitals-change","status":"publish","type":"post","link":"https:\/\/www.mediavine.com\/blog\/google-announces-core-web-vitals-change\/","title":{"rendered":"Google Announces Core Web Vitals Change: Less (Than) is More"},"content":{"rendered":"\r\n<div class=\"wp-block-group alignfull has-global-padding is-layout-constrained wp-block-group-is-layout-constrained\" style=\"margin-top:0;margin-bottom:0;padding-top:0;padding-bottom:0\">\r\n<article class=\"wp-block-group alignfull has-global-padding is-layout-constrained wp-block-group-is-layout-constrained\" style=\"padding-top:0;padding-bottom:0\">\r\n<section class=\"wp-block-group alignfull is-style-beige has-global-padding is-layout-constrained wp-container-core-group-is-layout-772205c6 wp-block-group-is-layout-constrained is-style-beige--1\" style=\"padding-top:var(--wp--preset--spacing--50)\">\r\n<header class=\"wp-block-group c-breadcrumbs aligngrid has-global-padding is-content-justification-left is-layout-constrained wp-container-core-group-is-layout-61973aa6 wp-block-group-is-layout-constrained\" style=\"margin-top:0;margin-bottom:0\">\r\n<header class=\"wp-block-group aligngrid is-content-justification-left is-nowrap is-layout-flex wp-container-core-group-is-layout-d68226ec wp-block-group-is-layout-flex\" style=\"margin-top:0;margin-bottom:var(--wp--preset--spacing--30)\">\r\n<figure class=\"wp-block-image size-large is-resized\" style=\"margin-bottom:5px\"><img decoding=\"async\" src=\"https:\/\/mediavine-dev.d1.moderntribe.qa\/wp-content\/uploads\/2025\/10\/chevron-left2.svg\" alt=\"\" class=\"wp-image-542\" style=\"aspect-ratio:9\/16;object-fit:contain;width:auto;height:20px\"\/><\/figure>\r\n\r\n\r\n\r\n<p class=\"is-style-small is-style-small--2\"><a href=\"\/blog\/\">Back to Blog<\/a><\/p>\r\n<\/header>\r\n\r\n\r\n\r\n<hr class=\"wp-block-separator has-alpha-channel-opacity aligngrid\" style=\"margin-top:0;margin-bottom:0\"\/>\r\n<\/header>\r\n<\/section>\r\n\r\n\r\n\r\n<section class=\"wp-block-group alignfull is-style-default has-neutral-20-background-color has-background has-global-padding is-layout-constrained wp-block-group-is-layout-constrained\" style=\"margin-bottom:var(--wp--preset--spacing--70);padding-top:var(--wp--preset--spacing--40);padding-bottom:var(--wp--preset--spacing--60)\"><div class=\"aligncenter aligncenter wp-block-tribe-terms\"><ul class=\"wp-block-tribe-terms__list\"><li class=\"wp-block-tribe-terms__term\"><span class=\"wp-block-tribe-terms__link t-category\">Pagespeed<\/span><\/li><\/ul><\/div>\r\n\r\n<h1 style=\"margin-top:var(--wp--preset--spacing--10);\" class=\"has-text-align-center wp-block-post-title\">Google Announces Core Web Vitals Change: Less (Than) is More<\/h1>\r\n\r\n\r\n<div class=\"wp-block-group is-content-justification-center is-nowrap is-layout-flex wp-container-core-group-is-layout-9b38c6d9 wp-block-group-is-layout-flex\" style=\"margin-top:var(--wp--preset--spacing--30);margin-bottom:0;padding-top:0;padding-bottom:0\"><div style=\"margin-bottom:0;margin-top:0;margin-left:0;margin-right:0;\" class=\"has-text-align-center wp-block-post-author-name\">Steve Marsi<\/div>\r\n\r\n\r\n<p>\u2022<\/p>\r\n\r\n\r\n<div style=\"padding-top:0;padding-bottom:0;padding-left:0;padding-right:0;margin-top:0;margin-bottom:0;margin-left:0;margin-right:0;\" class=\"has-text-align-center wp-block-post-date has-10-font-size\"><time datetime=\"2021-02-19T13:52:15-06:00\">February 19, 2021<\/time><\/div><\/div>\r\n<\/section>\r\n\r\n\r\n\r\n<section class=\"wp-block-group alignfull has-global-padding is-layout-constrained wp-block-group-is-layout-constrained\" style=\"padding-top:0;padding-bottom:0\">\n<p>Google quietly announced a small change in how it calculates Core Web Vitals data in Search Console this week.<\/p>\n\n\n\n<p>This <a href=\"https:\/\/support.google.com\/webmasters\/answer\/6211453?hl=en#zippy=%2Ccore-web-vitals\" target=\"_blank\" rel=\"noreferrer noopener\">change in Google&#8217;s calculation methods<\/a> for these all-important pagespeed metrics is so subtle you could easily miss it.<\/p>\n\n\n\n<p>As of February 17, 2021, instead of using &#8220;less than&#8221; as a boundary for web page scores, Google is using &#8220;less than or equal to.&#8221;<\/p>\n\n\n\n<p>While we&#8217;re talking about fractions of a second here, this entire exercise is about fractions of seconds and every little bit helps.<\/p>\n\n\n\n<p>Google says this tiny adjustment can result in publishers seeing changes from red to yellow or yellow to green indicators.<\/p>\n\n\n\n<p>Here&#8217;s the official wording, which we&#8217;ll translate below.<\/p>\n\n\n\n<p>&#8220;The metrics defining the boundaries for LCP, FID, CLS, which used to be &lt; (less than), are now defined as &lt;= (less than or equal to). Therefore you might see a change in statuses (for the better) in this report.&#8221;<\/p>\n\n\n\n<p>Basically, instead of being flagged as &#8220;Needs Improvement&#8221; if you&#8217;re right on the number, Google now gives you the green light.<\/p>\n\n\n\n<p>Here are the boundaries:<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"560\" src=\"https:\/\/www.mediavine.com\/wp-content\/uploads\/2021\/02\/Web-vitals-update-2021-02-1024x560.jpg\" alt=\"\" class=\"wp-image-28804\" srcset=\"https:\/\/www.mediavine.com\/wp-content\/uploads\/2021\/02\/Web-vitals-update-2021-02-1024x560.jpg 1024w, https:\/\/www.mediavine.com\/wp-content\/uploads\/2021\/02\/Web-vitals-update-2021-02-320x175.jpg 320w, https:\/\/www.mediavine.com\/wp-content\/uploads\/2021\/02\/Web-vitals-update-2021-02-768x420.jpg 768w, https:\/\/www.mediavine.com\/wp-content\/uploads\/2021\/02\/Web-vitals-update-2021-02-1536x841.jpg 1536w, https:\/\/www.mediavine.com\/wp-content\/uploads\/2021\/02\/Web-vitals-update-2021-02-1170x640.jpg 1170w, https:\/\/www.mediavine.com\/wp-content\/uploads\/2021\/02\/Web-vitals-update-2021-02-375x205.jpg 375w, https:\/\/www.mediavine.com\/wp-content\/uploads\/2021\/02\/Web-vitals-update-2021-02-800x438.jpg 800w, https:\/\/www.mediavine.com\/wp-content\/uploads\/2021\/02\/Web-vitals-update-2021-02-569x311.jpg 569w, https:\/\/www.mediavine.com\/wp-content\/uploads\/2021\/02\/Web-vitals-update-2021-02-353x193.jpg 353w, https:\/\/www.mediavine.com\/wp-content\/uploads\/2021\/02\/Web-vitals-update-2021-02-288x158.jpg 288w, https:\/\/www.mediavine.com\/wp-content\/uploads\/2021\/02\/Web-vitals-update-2021-02-335x183.jpg 335w, https:\/\/www.mediavine.com\/wp-content\/uploads\/2021\/02\/Web-vitals-update-2021-02-347x190.jpg 347w, https:\/\/www.mediavine.com\/wp-content\/uploads\/2021\/02\/Web-vitals-update-2021-02-520x285.jpg 520w, https:\/\/www.mediavine.com\/wp-content\/uploads\/2021\/02\/Web-vitals-update-2021-02-640x350.jpg 640w, https:\/\/www.mediavine.com\/wp-content\/uploads\/2021\/02\/Web-vitals-update-2021-02.jpg 1668w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p>If Google loves one thing in this world, it&#8217;s acronyms. If it loves two things, it&#8217;s acronyms and performance metrics.<\/p>\n\n\n\n<p><a href=\"https:\/\/www.mediavine.com\/lighthouse-6-web-vitals\/\">Core Web Vitals<\/a>, integrated into <a href=\"https:\/\/www.mediavine.com\/lighthouse-version-6-changes-whats-new-for-content-creators\/\">Lighthouse 6<\/a> in mid-2020, delivers on both fronts! They are comprised of three important metrics:<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li><a href=\"https:\/\/www.mediavine.com\/google-page-experience-signals-coming-may-2021\/\">Largest Contentful Paint<\/a> (LCP): A measure of load performance, or whether your largest content load happens within 2.5 seconds.<\/li><li>First Input Delay (FID): A measure of interactivity; when a user taps on something, the web browser should respond as close to instantly as possible, defined as within 100 milliseconds.<\/li><li><a href=\"https:\/\/www.mediavine.com\/cls-solving-for-cumulative-layout-shift\/\">Cumulative Layout Shift<\/a> (CLS): You know this when you see it. CLS is a measure of visual stability, or the idea that items within the browser window shouldn\u2019t move around while a page loads. The ideal score is defined by Google as 0.1 or lower.<\/li><\/ul>\n\n\n\n<p>These figures have been the targets all along, but now that &#8220;equal <em>or<\/em> less than&#8221; puts you in the green, at least you have the extra millisecond(s).<\/p>\n\n\n\n<p>In other words, scores of 2.5 for LCP, 100 ms for PID and 0.1 for CLS all qualify as good now, thanks to this change. <\/p>\n\n\n\n<p>Before, you needed 2.49, 99 and 0.099 respectively. Again, that&#8217;s not as significant as it seems given the speeds we&#8217;re talking about.<\/p>\n\n\n\n<p>We wouldn&#8217;t be surprised if some of you see more green based on this subtle shift when reporting updates in a few days.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"938\" height=\"423\" src=\"https:\/\/www.mediavine.com\/wp-content\/uploads\/2021\/02\/image-28.png\" alt=\"Google Search Console Results improving after the update\" class=\"wp-image-28808\" srcset=\"https:\/\/www.mediavine.com\/wp-content\/uploads\/2021\/02\/image-28.png 938w, https:\/\/www.mediavine.com\/wp-content\/uploads\/2021\/02\/image-28-320x144.png 320w, https:\/\/www.mediavine.com\/wp-content\/uploads\/2021\/02\/image-28-768x346.png 768w, https:\/\/www.mediavine.com\/wp-content\/uploads\/2021\/02\/image-28-375x169.png 375w, https:\/\/www.mediavine.com\/wp-content\/uploads\/2021\/02\/image-28-800x361.png 800w, https:\/\/www.mediavine.com\/wp-content\/uploads\/2021\/02\/image-28-569x257.png 569w, https:\/\/www.mediavine.com\/wp-content\/uploads\/2021\/02\/image-28-353x159.png 353w, https:\/\/www.mediavine.com\/wp-content\/uploads\/2021\/02\/image-28-288x130.png 288w, https:\/\/www.mediavine.com\/wp-content\/uploads\/2021\/02\/image-28-335x151.png 335w, https:\/\/www.mediavine.com\/wp-content\/uploads\/2021\/02\/image-28-347x156.png 347w, https:\/\/www.mediavine.com\/wp-content\/uploads\/2021\/02\/image-28-520x234.png 520w, https:\/\/www.mediavine.com\/wp-content\/uploads\/2021\/02\/image-28-640x289.png 640w\" sizes=\"auto, (max-width: 938px) 100vw, 938px\" \/><\/figure>\n\n\n\n<p>Behind the scenes, Mediavine is working to ensure that all of our products help publishers attain and maintain optimal scores.<\/p>\n\n\n\n<p><a href=\"https:\/\/www.mediavine.com\/getting-your-site-ready-for-trellis\/\">Trellis<\/a>, <a href=\"https:\/\/www.mediavine.com\/create-and-grow-past-present-future\/\">Create<\/a> and <a href=\"https:\/\/www.mediavine.com\/what-is-grow-me\/\">Grow<\/a> are optimized for LCP, FID and CLS alike, while Mediavine ads are already optimized for LCP and FID; we\u2019re currently testing a CLS solution that we hope to release soon!<\/p>\n\n\n\n<p>Please see the above links for even more details on Web Vitals and check out our additional <a href=\"https:\/\/www.mediavine.com\/mediavines-pagespeed-resources\/\">pagespeed resources<\/a>.<\/p>\n\n\n\n<p>You&#8217;ve heard us talk about pagespeed a time or 300 because these scores impact rankings, user experience and earning potential.<\/p>\n\n\n\n<p>Faster sites are better sites. One nanosecond at a time.<\/p>\n<\/section>\r\n\r\n\r\n\r\n<section class=\"wp-block-group has-global-padding is-layout-constrained wp-block-group-is-layout-constrained\" style=\"margin-top:0\">\r\n<div class=\"wp-block-group has-global-padding is-layout-constrained wp-container-core-group-is-layout-09aec4f2 wp-block-group-is-layout-constrained\" style=\"margin-top:var(--wp--preset--spacing--40);padding-top:var(--wp--preset--spacing--50);padding-right:0;padding-bottom:var(--wp--preset--spacing--60)\">\r\n<p class=\"is-style-small is-style-small--3\">About the author<\/p>\r\n\r\n\r\n<div style=\"margin-top:var(--wp--preset--spacing--20);\" class=\"wp-block-post-author\"><div class=\"wp-block-post-author__avatar\"><img alt='' src='https:\/\/secure.gravatar.com\/avatar\/033e1d1dad8227b46745d12af4d935ef1fc9e4febca51b9f175c69dbdf01a5df?s=96&#038;d=blank&#038;r=g' 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10.389641 9.9355625 10.347156 9.7890625 10.285156 9.6640625 C 10.223156 9.5390625 9.737625 8.3065 9.515625 7.8125 C 9.328625 7.3975 9.131125 7.3878594 8.953125 7.3808594 C 8.808125 7.3748594 8.6425625 7.375 8.4765625 7.375 z\"><\/path><\/svg>\t\t<span class=\"wp-block-outermost-social-sharing-link-label screen-reader-text\">\n\t\t\tShare on WhatsApp\t\t<\/span>\n\t<\/a>\n<\/li>\n<\/ul>\r\n<\/div>\r\n<\/section>\r\n<\/article>\r\n\r\n\r\n\r\n<aside class=\"wp-block-group aligngrid  is-animated-on-scroll-25 tribe-animation-type-fade-in tribe-animation-direction-bottom is-layout-flow wp-block-group-is-layout-flow\" style=\"margin-top:var(--wp--preset--spacing--40);margin-bottom:0;padding-top:var(--wp--preset--spacing--60);padding-bottom:var(--wp--preset--spacing--50);--tribe-animation-speed:0.6s;--tribe-animation-offset:50px;--tribe-animation-delay:0s;--tribe-animation-easing:var(--easing--ease-out-sine)\">\r\n<h2 class=\"wp-block-heading is-style-small is-style-small--5\" 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Best practices for choosing&#8230;<\/p>\n\t\t\t<\/div>\n\t<a href=\"https:\/\/www.mediavine.com\/blog\/choose-fonts-site-speed-accessibility\/\" class=\"c-post-card__link-overlay\" aria-label=\"Read more about How to Choose Fonts for Site Speed and Accessibility\"><\/a>\n<\/article>\n\t<\/div>\n<\/aside>\r\n<\/div>\r\n","protected":false},"excerpt":{"rendered":"<p>Back to Blog \u2022 Google quietly announced a small change in how it calculates Core Web Vitals data in Search Console this week. This change in Google&#8217;s calculation methods for these all-important pagespeed metrics is so subtle you could easily miss it. As of February 17, 2021, instead of using &#8220;less than&#8221; as a boundary&#8230;<\/p>\n","protected":false},"author":44445,"featured_media":28801,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_searchwp_excluded":"","footnotes":""},"categories":[94],"tags":[],"audience_post":[],"class_list":["post-28786","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-pagespeed"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.1 (Yoast SEO v27.1.1) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Google Announces Core Web Vitals Change: Less (Than) is More - Mediavine<\/title>\n<meta name=\"description\" content=\"Google announced a small change to how it calculates Core Web Vitals data in Search Console this week. 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