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metrics enables webmasters to align technical optimizations with actual ranking signals rather than assumptions or outdated practices.
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★★★ How Can You Tell a Good Crawler from a Bad One and Why Does It Matter for Your SEO?
Martin Splitt and Gary Illyes recently highlighted the essential attributes of a good crawler: Attributes of a good crawler according to Martin Splitt Support HTTP/2 for better performance and efficie...
Gary Illyes Aug 26, 2025
★★★ Why Do Core Web Vitals Show Different Results Between CrUX and Search Console?
CrUX and Search Console often show different Core Web Vitals results because they measure with distinct approaches: CrUX aggregates user experiences by page views (each visit counts, favoring high-tra...
Google Aug 26, 2025
★★★ Should You Really Avoid Lazy Loading on Above-the-Fold Images to Improve Your SEO?
In a recent episode of Search Off the Record, Martin Splitt warns against using lazy loading for images that are visible as soon as users land on the page: this delays the Largest Contentful Paint (LC...
Martin Splitt Aug 26, 2025
★★ Is native HTML lazy loading really enough to optimize your page crawl?
Native HTML lazy loading only works for image and iframe elements. To lazy load other content (videos, widgets, comments, API content), custom JavaScript remains necessary....
Martin Splitt Aug 21, 2025
★★ Does WordPress's native lazy loading really boost your SEO performance?
WordPress now implements native lazy loading by default for images thanks to a contribution from Felix Arntz, an engineer at Google. This practice has become widespread across modern CMS platforms....
Martin Splitt Aug 21, 2025
★★★ Is lazy loading actually killing your LCP?
Lazy loading directly influences Core Web Vitals, particularly the Largest Contentful Paint (LCP). Poorly implemented lazy loading on visible images delays rendering and degrades measured performance....
Martin Splitt Aug 21, 2025
Why does Google really insist that infinite scroll and lazy loading are fundamentally different?
Infinite scroll and lazy loading are philosophically different: lazy loading loads non-critical resources of an already-defined page, while infinite scroll loads additional content to create an infini...
Martin Splitt Aug 21, 2025
★★ What if your LCP is a text block loaded in JavaScript—how does Google actually measure it?
Largest Contentful Paint isn't necessarily an image. A substantial text block loaded late via an API can also constitute the LCP and be impacted by inefficient loading....
Martin Splitt Aug 21, 2025
★★★ Is your lazy loading blocking Google from seeing your images?
To verify that lazy loading works correctly for SEO, use the URL inspection tool in Search Console and examine the rendered HTML. All image URLs must appear in the 'src' attribute of image tags....
Martin Splitt Aug 21, 2025
★★★ Should you really ban lazy loading from hero images?
Never apply lazy loading to images that are immediately visible (hero image, header). This delays their loading and negatively impacts the Largest Contentful Paint, because the browser cannot preload ...
Martin Splitt Aug 21, 2025
★★ Is lazy loading destroying your image indexation in Google?
If your images aren't being indexed at scale, this may indicate a lazy loading implementation problem. Verify that images appear correctly in the Google Images index to confirm their detection....
Martin Splitt Aug 21, 2025
★★ Does lazy loading really boost your SEO, or just your page speed?
The main SEO impact of lazy loading comes through performance improvement. Core Web Vitals are a ranking factor, although their weight is generally minimal except in exceptional cases....
Martin Splitt Aug 21, 2025
★★★ Is your custom JavaScript lazy loading library sabotaging Google's ability to index your images?
Custom JavaScript libraries that use attributes like 'data-src' instead of 'src' can prevent Google from indexing images. If the 'src' attribute is not properly populated, the image won't be detected ...
Martin Splitt Aug 21, 2025
★★★ Is the HTML loading=lazy attribute really enough to prevent indexation issues?
Browsers natively support lazy loading via the 'loading=lazy' attribute for images and iframes. This HTML method is preferable to JavaScript libraries because it is simpler and avoids potential indexa...
Martin Splitt Aug 21, 2025
★★ Can Core Web Vitals Sabotage Actually Hurt Your SEO Rankings?
The attack known as "Core Web Vitals poisoning" aims to artificially sabotage a website's web performance indicators (LCP, FID, CLS) in order to alter the scores measured by tools like webvitals-js. J...
John Mueller Aug 19, 2025
★★★ Should You Really Be Worried About GEO, AIO, and AEO for Your SEO?
John Mueller from Google warns against the proliferation of new AI-related SEO acronyms such as GEO, AIO, or AEO, emphasizing that the more insistent and urgent their promotion, the more likely it is ...
John Mueller Aug 19, 2025
★★★ Should You Delete Past Event Pages or Keep Them for SEO?
John Mueller provided practical advice on the SEO management of web pages for shows, events or performances once they have ended. He compares this situation to that of out-of-stock products in e-comme...
John Mueller Jul 29, 2025
★★★ Why does Martin Splitt place such strong emphasis on installing Search Console and measurement tools?
It is necessary to configure Search Console and a measurement system (analytics or similar) to track SEO performance and understand whether changes have a positive impact on your site's objectives....
Martin Splitt Jul 10, 2025
★★★ Do You Really Need Perfectly Valid HTML Code to Rank Well on Google?
In an episode of the Search Off the Record podcast, John Mueller and Martin Splitt revealed that the overwhelming majority of well-ranked sites have invalid HTML, without it harming their SEO: "Search...
John Mueller Jul 08, 2025
★★ Will Search Console's Core Web Vitals recommendations finally make a real difference?
Search Console now displays recommendations when individual Core Web Vitals elements are particularly poor. These measurements are based on real user experience and poor values can discourage visits....
John Mueller Jul 01, 2025
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