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metrics enables webmasters to align technical optimizations with actual ranking signals rather than assumptions or outdated practices.
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★★★ Why do you need to wait 28 days to see the SEO impact of your Core Web Vitals optimizations?
Field data from Core Web Vitals (Chrome User Experience Report) takes about 28 days to update after changes on the site. The changes are not immediate but appear gradually with a subtle rise over time...
John Mueller Apr 23, 2021
★★ Does the number of pages in Search Console's Core Web Vitals reports fluctuate for no apparent reason?
The aggregated Core Web Vitals reports in Search Console show a significant sample of pages that can vary over time. The total number of pages displayed might fluctuate even if performance remains unc...
John Mueller Apr 23, 2021
★★★ Are Core Web Vitals Really Reflecting What Your Users Experience?
For Core Web Vitals, Google uses field data based on what users actually see in the search results. If AMP pages are displayed, the metrics are based on the AMP pages. If it's the mobile web pages, th...
John Mueller Apr 23, 2021
★★ Why do your Search Console data fluctuate so much from one query to another?
The metrics in the search performance report are based on real search results, but these real results can vary greatly from one search to another....
John Mueller Apr 21, 2021
★★★ Does Google Search Console's average position really reflect the reality of your rankings?
The data from the search performance report in Google Search Console is based on actual search results displayed to users, not theoretical numbers....
John Mueller Apr 21, 2021
★★★ Do Core Web Vitals Really Take 28 Days to Impact Your SEO Rankings?
John Mueller explained in a webmaster hangout that Core Web Vitals "scores" (LCP, CLS, FID) would not be calculated in real-time (unlike filters such as Panda or Penguin, for example) starting next Ma...
John Mueller Apr 19, 2021
★★★ Is UX really a Google ranking factor or just a side effect?
Google does not have a pure 'user experience' ranking factor, but rather elements related to it: the page layout algorithm (meaningful unique content above the fold vs. ads) and Core Web Vitals (loadi...
John Mueller Apr 16, 2021
★★★ Do Core Web Vitals on desktop really have no impact on Google rankings?
For now, only mobile user experience (mobile Core Web Vitals) will be used as a ranking factor, and only in mobile search results. Desktop results will not take Core Web Vitals into account. Other pag...
John Mueller Apr 16, 2021
★★ Why are Core Web Vitals a disaster on mobile despite the mobile-first approach?
Desktop continues to be the most efficient platform for users despite more users on mobile devices. 33.1% of sites achieve good Core Web Vitals on desktop compared to only 20% on mobile....
Google Apr 15, 2021
★★ How does Google process a query in mere milliseconds?
The serving system processes queries in two directions: downward (parsing the request, routing to various indexes) and upward (retrieving results, ranking, assembling). This entire process takes place...
Gary Illyes Apr 13, 2021
★★ Are your SEO changes truly reflected instantly by Google?
For frequent queries in a geographical area, Google utilizes a caching system that returns cached results for several minutes. Users in the same region are generally routed to the same data center, wh...
Gary Illyes Apr 13, 2021
★★★ Should you still rely on Google Cache to verify JavaScript rendering?
Google's cache is an old, unmaintained feature. The version displayed is random: it may be from a previous crawl, before or after JavaScript rendering. Do not use the text cache to check if JavaScript...
Martin Splitt Apr 09, 2021
★★ Does AMP really ensure good Core Web Vitals?
Even though AMP makes it easier to create fast pages, it is entirely possible for an AMP page to fail Core Web Vitals tests. AMP is not an automatic guarantee of success against performance criteria....
John Mueller Apr 09, 2021
★★★ Do Core Web Vitals really only serve to separate tie results?
Core Web Vitals primarily serve as a tiebreaker signal when multiple results are considered equivalent in relevance. Google can then favor the page that meets the Core Web Vitals thresholds. This is n...
John Mueller Apr 09, 2021
★★★ Why do your Core Web Vitals optimizations take 28 days to show up in Search Console?
The Chrome User Experience Report data used for Core Web Vitals in Search Console has a collection delay of about 28 days. A technical change tested today in Lighthouse will only be visible in Search ...
John Mueller Apr 09, 2021
★★★ Are Search Console tools truly enough to audit your pages' JavaScript rendering?
To check JavaScript rendering, use the live test from Search Console, the mobile compatibility test, or the rich results test. These tools utilize the same pipeline as Googlebot and display the render...
Martin Splitt Apr 09, 2021
★★★ How does the geolocation of your visitors affect your Core Web Vitals?
For Core Web Vitals, Google measures the actual experience of users. If 90% of visitors come from countries with slow connections and have a poor experience, it is this experience that will be taken i...
John Mueller Apr 09, 2021
★★★ Does Google really require AMP for Web Stories?
For a Web Story to qualify for appearing on Google Search, Discover, or Images, it must be a valid AMP complying with AMP specifications. This allows the story to be served via the AMP cache and ensur...
Pascal Birchler Apr 08, 2021
★★ How can Search Console truly optimize your Web Stories for Google Search and Discover?
Search Console allows you to measure and improve the performance of your Web Stories on Google Search and Discover. Its tools and reports assist in analyzing traffic, fixing issues, and optimizing the...
Pascal Birchler Apr 08, 2021
★★★ Do News sitemaps really speed up the indexing of your content?
News sitemaps (limited to 1000 URLs) help Google index content from sites already identified as news sources more quickly. However, using a News sitemap will not speed up indexing if Google is not alr...
John Mueller Apr 01, 2021
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