What does Google say about SEO? /
Domain age and historical factors remain hotly debated topics in the SEO community. This category compiles Google's official statements regarding how domain age, history, and accumulated reputation influence search rankings. SEO professionals frequently question whether the sandbox effect truly exists for new websites, whether older domains hold inherent advantages, and how a site's history impacts current performance—including previous ownership changes, past penalties, and archived content. Google representatives have consistently addressed these concerns, particularly regarding the concept of trust built over time. Understanding these official positions helps practitioners separate persistent myths from actual ranking factors recognized by Google's algorithms. This knowledge proves invaluable when acquiring expired domains, conducting site migrations, or implementing rebranding strategies where historical signals can significantly impact future SEO performance. These declarations provide clarity on what truly matters: quality content and user experience rather than mere domain age, helping SEO specialists make informed strategic decisions based on verified information rather than speculation or outdated assumptions about temporal ranking factors.
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★★ Should you offer Markdown versions of your content to enhance your visibility in AI-generated results?
An SEO consultant saw claims circulating that Google Search Central would serve Markdown versions of its blog articles to boost its visibility in AI-generated results. He delved into the topic, inspec...
John Mueller Apr 21, 2026
★★★ Could a domain name similar to a competitor harm your SEO?
A webmaster was concerned about having a domain very close to another (only one letter difference). John Mueller responds that this is generally not an issue for SEO in itself. The only real risk iden...
John Mueller Apr 21, 2026
★★★ Does Markdown Really Work for SEO, or Should You Always Use HTML Instead?
On LinkedIn, someone asked John Mueller whether Google treats .md pages (that is, Markdown) differently from standard HTML pages, and more specifically whether they are properly rendered and accessibl...
John Mueller Apr 14, 2026
★★★ Should you really avoid using unique canonicals on multi-page e-commerce sites?
On LinkedIn, Rowan Collins, SEO Consultant, exchanged with John Mueller on a specific point about e-commerce structured data. For a multi-page site, each product variant with its own URL should not be...
John Mueller Mar 31, 2026
★★★ Is page size really still hurting your SEO in 2024?
Large pages continue to pose problems for users with slow connections or limited storage space on their devices, even as networks become faster. Speed is partly related to size because the more data t...
Gary Illyes Mar 30, 2026
Why does Google enforce a strict 1MB image size limit across its developer documentation?
Internally, Google uses a linter that prevents submission to developer documentation sites if an image exceeds one megabyte. This limit is designed to maintain optimal performance on official document...
Martin Splitt Mar 30, 2026
★★ Is network compression really enough to optimize your site's crawlability?
Network-level compression helps reduce data transfer time, but does not solve the problem of storage space on the user's device or crawler. Data must be decompressed and stored locally....
Martin Splitt Mar 30, 2026
★★★ Is mobile-desktop mismatch really destroying your SEO rankings right now?
During the shift to mobile-first indexing, Google observed that a large number of pages showed differences between mobile and desktop versions (distinct URLs). Content was often missing on mobile, alo...
Martin Splitt Mar 30, 2026
★★ Does network compression really improve your site's crawl budget?
Network-level compression reduces the amount of data transferred, but doesn't decrease the storage space needed on the user's device or crawler side. It only helps accelerate the transfer....
Martin Splitt Mar 30, 2026
★★ Has mobile page weight tripled in 10 years? Why should SEO professionals care about this trend?
Data from the Web Almanac 2025 shows that the median weight of a mobile homepage has grown from 845 KB in 2015 to 2.3 MB in July 2025, representing a threefold increase over 10 years....
Gary Illyes Mar 30, 2026
★★ Is your page weight really slowing down your SEO performance?
Studies show that fast websites have better retention and conversion rates. Speed depends partly on page size: the more data to transfer, the longer the transfer and processing time....
Martin Splitt Mar 30, 2026
★★ Is Google really enforcing a strict 1 MB limit on images—and what does that tell you about SEO priorities?
Google uses an internal linter that prevents the submission of images larger than 1 MB on developer documentation sites, underscoring the importance of image optimization....
Martin Splitt Mar 30, 2026
★★ Does structured data really bloat your HTML and hurt page performance?
Adding structured data (structured metadata) can considerably increase the weight of an HTML page because these are metadata intended for machines, not users. Google supports many types of structured ...
Gary Illyes Mar 30, 2026
★★ Is lazy loading really a must-have SEO performance lever you should activate systematically?
Lazy loading (deferred loading) allows you to load only heavy resources such as images when the user scrolls toward them, rather than loading everything upfront. This reduces the initial page load....
Gary Illyes Mar 30, 2026
★★★ Does page loading speed really impact your conversion rates?
Studies show that faster websites have better retention and conversion rates. Reducing page size helps improve speed, because less data to transfer means faster loading and processing....
Martin Splitt Mar 30, 2026
★★ Is exploding web page weight hurting your SEO? Here's what you need to know
According to the Web Almanac 2025, the median weight of a mobile homepage rose from 845 KB in 2015 to 2.3 MB in July 2025—a threefold increase. This growth substantially exceeds the improvement in Int...
Gary Illyes Mar 30, 2026
★★ Does your website's overall size really hurt your SEO performance?
In the context of weight and size, it's more relevant to talk about webpages rather than websites. The notion of a 'heavy site' doesn't really make sense in SEO — it's the weight of individual pages t...
Gary Illyes Mar 30, 2026
★★★ Does page size really matter for SEO when internet connections keep getting faster?
Although internet connections are getting faster, the increase in webpage size is outpacing the increase in median transfer speeds for mobile connections. Size therefore remains an important factor fo...
Martin Splitt Mar 30, 2026
★★ Does site speed really impact your conversion rates?
Google acknowledges that studies show faster websites have better retention and conversion rates. Speed depends partly on page size: the more data to transfer, the longer the loading time....
Martin Splitt Mar 30, 2026
★★ Does page speed really impact conversions according to Google?
Studies show that faster websites have better retention and conversion rates. Speed depends partly on page weight: the more data there is to transfer, the longer the network and processor take to proc...
Martin Splitt Mar 30, 2026
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