What does Google say about SEO? /
Web performance has become an official ranking factor in Google's algorithm, particularly since the introduction of Core Web Vitals in 2020. This category compiles all official Google statements regarding loading speed optimization, performance metrics, and their impact on organic search rankings. SEO professionals will find Google's positions on key indicators such as Largest Contentful Paint (LCP), Cumulative Layout Shift (CLS), First Input Delay (FID), and Interaction to Next Paint (INP). Google regularly communicates about the importance of loading times, Time to First Byte (TTFB), cache optimization, and techniques like lazy loading. These official declarations help understand how Google truly measures user experience, which performance thresholds to prioritize, and how PageSpeed Insights integrates into a site's overall evaluation. For search practitioners, following Google's official recommendations on web performance is crucial to maintain or improve search rankings while delivering an optimal user experience that enhances conversion rates and visitor retention. Understanding Google's evolving stance on speed metrics enables webmasters to align technical optimizations with actual ranking signals rather than assumptions or outdated practices.
Quick SEO Quiz

Test your SEO knowledge in 5 questions

Less than a minute. Find out how much you really know about Google search.

🕒 ~1 min 🎯 5 questions
★★★ Are Web Vitals Truly an Unfailing Ranking Factor?
It is not possible to either fail or succeed in Web Vitals metrics. These are tools used by Google to compare the relative performances between pages. Better scores increase the likelihood of surpassi...
Patrick Kettner Jun 14, 2021
★★ Why are AMP pages still being preloaded on Google?
If a site is already publishing AMP pages, nothing changes. The AMP project and AMP caches remain very active, and AMP pages will continue to be preloaded and prerendered from search results....
Patrick Kettner Jun 14, 2021
★★ How do signed exchanges enhance preloading for non-AMP pages in SEO?
Signed exchanges enable non-AMP pages to benefit from preloading while preserving user privacy and displaying real URLs instead of cache URLs....
Patrick Kettner Jun 14, 2021
★★ Will Google's CLS change really affect your SEO?
The recent change to the CLS metric (Cumulative Layout Shift) should have only positive effects. For regular websites (non single-page apps), no changes should be observed. If negative effects occur, ...
John Mueller Jun 11, 2021
★★★ Is it true that only moving from Bad to Good in Core Web Vitals changes your ranking?
<p>For Page Experience, Google distinguishes three levels: Bad, Needs Improvement, and Good. The impact on ranking primarily occurs between Needs Improvement and Good. Moving from Good to Really Good ...
John Mueller Jun 11, 2021
★★★ Does relevance still take precedence over Page Experience?
The Page Experience update does not surpass relevance factors. If pages are highly relevant to a query, they will continue to rank well even if their speed is lacking. Relevance remains a paramount fa...
John Mueller Jun 11, 2021
★★★ Is it true that AMP is no longer needed for the Top Stories carousel?
AMP is no longer mandatory to appear in the Top Stories carousel. Google is now concentrating on Core Web Vitals and page experience factors. AMP continues to be an easy method for achieving good perf...
John Mueller Jun 04, 2021
★★★ Should you be concerned about the 28-day update delay for Core Web Vitals?
Core Web Vitals field data takes 28 days to update in Search Console. It is possible to use Google Analytics with an additional script to track your own field data in near real-time....
John Mueller Jun 04, 2021
★★★ Why does Google rely on field data for Core Web Vitals rankings?
For ranking based on Core Web Vitals, Google uses field data from real users, not lab data from tests. Field data reflects the actual user experience across different devices and connections....
John Mueller Jun 04, 2021
★★★ How Do Redirects Actually Impact Your Core Web Vitals Scores?
John Mueller indicated during a webmaster hangout that redirecting one URL to another will also transfer the Core Web Vitals scores (LCP, FID, CLS) before they are recalculated for the new URL......
John Mueller May 31, 2021
★★★ Do third-party scripts really slow down your SEO performance?
Third-party JavaScript scripts that slow down a page (such as reCAPTCHA or Google Ads) are included in the speed assessment. Google does not make exceptions for its own scripts. If a script disrupts t...
John Mueller May 28, 2021
★★★ Why do real-world data outshine Lighthouse for your SEO performance?
Lighthouse data are useful lab simulations that help identify improvement opportunities. For ranking, it’s the field data visible in PageSpeed Insights and Search Console that truly matters....
Google May 27, 2021
★★★ How do Core Web Vitals really impact SEO with CrUX data?
<p>For Page Experience, Google primarily uses field data at the page level from the Chrome User Experience Report (CrUX). If this data is insufficient, it resorts to origin or groups of similar pages ...
Google May 27, 2021
★★★ Does AMP really affect your website's SEO?
AMP is not a ranking factor. AMP can be used on large dynamic sites, not just for news. If AMP makes the site faster, it can help through the page speed factor, but not directly through AMP....
Martin Splitt May 26, 2021
★★★ Does JavaScript Really Affect Crawlability?
JavaScript generally has no impact on crawlability. The blocking of the main thread by JavaScript is a loading performance issue, not a crawling issue. Crawling and rendering are two distinct steps....
Martin Splitt May 26, 2021
★★ Why should you steer clear of inline JavaScript for large SEO scripts?
You should not inline large amounts of JavaScript because it prevents caching. External JavaScript files can be cached and are only downloaded occasionally, unlike inline code which must be downloaded...
Martin Splitt May 26, 2021
★★★ Do Google’s third-party tools really impact your SEO?
Google Search treats all third-party tools as third parties, including Google Analytics, Google Ads, reCAPTCHA, and Tag Manager. They do not receive any special treatment and can impact performance ju...
Martin Splitt May 26, 2021
★★ Why is page speed essential for SEO rankings?
Page speed is one of many ranking factors. If a competing site is faster, all else being equal, it may gain a ranking advantage due to its speed, not because of the technology used....
Martin Splitt May 26, 2021
★★ Does blocking the main thread really impact SEO?
The fact that JavaScript blocks the main thread is not a problem for Google's rendering. However, it impacts real user experience by making the site unresponsive, which in turn affects page speed, a r...
Martin Splitt May 26, 2021
★★ Do You Really Need to Achieve All 3 Core Web Vitals Scores to Improve Your SEO Rankings?
The past week has brought its usual harvest of information about the Core Web Vitals / Page Experience project, not always very precise: first of all, Jeffrey Jose (Google) indicated during GoogleI/O ...
John Mueller May 25, 2021
🔔

Get real-time analysis of the latest Google SEO declarations

Be the first to know every time a new official Google statement drops — with full expert analysis.

No spam. Unsubscribe in one click.