What does Google say about SEO? /
This category compiles all official Google statements regarding JavaScript and technical aspects of search engine optimization. Modern JavaScript frameworks (React, Angular, Vue.js) and web application architectures (SPA, SSR, CSR) present critical challenges for crawling and indexing. Google's guidance on JavaScript rendering, dynamic DOM manipulation, AJAX implementation, and API calls is essential for ensuring client-side content visibility. SEO professionals will find authoritative positions on implementation best practices, differences between server-side and client-side rendering, and recommendations for optimizing load times while guaranteeing content accessibility to search crawlers. Understanding data formats (JSON, XML) and their SEO implications completes this vital resource. These official declarations help prevent common technical implementation mistakes that can severely impact the search performance of modern websites and JavaScript-powered applications. Access to Google's verified positions on these technical matters enables practitioners to make informed architectural decisions and implement JavaScript solutions that maintain strong organic search visibility while delivering enhanced user experiences.
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★★★ Should you host your customer support on the same domain for SEO benefits?
Having a support site on the same domain name with a different subdomain, or even on a completely different domain name, is a perfectly normal configuration that causes no SEO problems whatsoever....
John Mueller Aug 06, 2025
★★★ Subdomain vs separate domain: Does Google really make a difference for your SEO?
Google attempts to index both the main site and the support site, whether they're on different subdomains (support.example.com vs www.example.com) or on completely different domains. Both versions are...
John Mueller Aug 06, 2025
★★★ Should You Use LLMS.txt to Optimize Your SEO for AI?
Gary Illyes recently stated on Bluesky that the LLMS.txt file, designed to "control" LLMs' access to web content, strongly resembles the meta keywords tag from the 1990s, which quickly became obsolete...
Gary Illyes Aug 05, 2025
★★★ Is Google Really Using MUVERA to Revolutionize Its Search System?
During an exchange at Search Central Live, Gary Illyes confirmed that Google uses a method similar to MUVERA, an innovative multi-vector search technique compressed into fixed vectors, which enables f...
Gary Illyes Aug 05, 2025
★★★ Is Classic SEO Really All You Need to Rank in AI Search?
Fabrice Canel, Product Manager at Bing, states that to optimize visibility in AI Search, simply following usual SEO best practices is sufficient—a view shared by Google. In a recent blog post, his tea...
Google Aug 05, 2025
★★ Should You Use a Noindex Header to Protect Your llms.txt Files from Google Indexing?
John Mueller answered a question about llms.txt files and their potential impact as duplicate content. He explained that these files would only be considered duplicate content if their content was ide...
John Mueller Jul 29, 2025
★★ Why does Google require <img> tags for stock images instead of CSS?
Even though stock images probably won't be indexed (Google acknowledges they already exist elsewhere), from a semantic standpoint, if they're part of the page's content, they should be in the HTML wit...
Martin Splitt Jul 24, 2025
★★ Does 100vh really cause indexation problems for your hero images?
Using 100vh (100% of the viewport height) for hero images can cause problems with the Inspect URL tool due to viewport expansion used during rendering. However, the content remains accessible in the D...
Martin Splitt Jul 24, 2025
★★ Can CSS Harm Your SEO Just Like JavaScript Does?
CSS is like JavaScript: it's perfectly acceptable to use it (everyone does), but it offers a lot of flexibility and power, which can sometimes lead to building things that don't work as intended for S...
John Mueller Jul 24, 2025
★★★ Is CSS ::before and ::after content really invisible to Google?
Content added via CSS pseudo-elements ::before and ::after does not appear in the DOM and will therefore not be taken into account by crawlers and accessibility tools. This content should only be used...
Martin Splitt Jul 24, 2025
★★ Can you display different prices based on geographic location without triggering an SEO penalty?
It is possible to display different prices for the same product across different US states on a website. Google can handle this price variation in search results, provided the implementation is correc...
John Mueller Jul 22, 2025
★★ Is searching your domain name on Google really enough to verify your site's technical health?
To verify that your site is technically sound, search your site by its name and domain name in Google. If results appear, the technical configuration is probably acceptable....
Martin Splitt Jul 10, 2025
★★ Are popular CMS platforms like WordPress really enough for serious technical SEO?
For small businesses using common CMS platforms like WordPress, Wix, or Squarespace, the technical foundation is generally solid and allows you to focus more on content creation....
Martin Splitt Jul 10, 2025
★★ Why do some SEO optimizations take months to deliver results?
Simple modifications like text changes are visible quickly, but larger strategic changes require time. A good SEO must be able to monitor and regularly explain the progress being made....
Martin Splitt Jul 10, 2025
★★★ Why does Google treat a domain change as a complete site migration?
When you want to move from an old domain to a new domain in Google Search, this constitutes a site migration. This operation requires following the official site migration process documented by Google...
Martin Splitt Jul 09, 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
★★ Are you really leaving all those Google scripts slowing down your site?
Integrating every possible Google JavaScript snippet on a site can make it extremely slow and cause rendering issues, which can have negative effects on SEO....
John Mueller Jun 26, 2025
★★★ Is your JavaScript content actually being indexed by Google, or is it invisible to Googlebot?
To verify if JavaScript is working correctly for SEO, use the URL inspection tool in Search Console or the rich results test. If important content appears in the rendered HTML, it will be indexed....
Martin Splitt Jun 26, 2025
★★ Does Google really give Angular special treatment in search rankings?
The fact that Angular is developed by Google provides no ranking advantage. No Google technology (Angular, Analytics, Ads) receives preferential treatment in search results....
John Mueller Jun 26, 2025
★★ How does Google actually discover all the URLs on your website?
Google discovers URLs through various methods: internal links, external links, and sitemaps. There is no need to worry about spam or technical URLs that Google crawls, especially if they redirect to 4...
Google Jun 26, 2025
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