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.
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
★★ Should you really limit the length of title tags to 60 characters?
There is value in having title tags longer than the display space in snippets. Google does not set a specific character count. The advice is to keep the title precise and relevant to the page, without...
Gary Illyes Feb 25, 2021
★★★ Why does JavaScript remain the most expensive resource for loading your pages?
Among all assets (HTML, CSS, JavaScript, images, videos, audio), JavaScript is the most costly resource because it must be downloaded, parsed into machine format, and then executed before content appe...
Martin Splitt Feb 25, 2021
★★ Should you still optimize JavaScript for search engines other than Google?
Martin Splitt specifies that he is specifically talking about Google Search. Other search engines may have different compromises and do not necessarily render all JavaScript pages....
Martin Splitt Feb 25, 2021
★★★ How can you tell if your site is affected by manual actions or algorithmic declines?
A manual action is targeted and occurs when a site violates guidelines (link manipulation, spam content). An algorithm change is not targeted and aims to resolve a systemic issue in search results. Yo...
Gary Illyes Feb 25, 2021
★★★ Is dynamic rendering really dead for SEO?
Google ceased recommending dynamic rendering with the release of Evergreen Googlebot in May 2019. While it is still supported, it is no longer considered a reasonable solution, and it's better to inve...
Martin Splitt Feb 25, 2021
★★★ Does Google really render all JavaScript pages without limitation?
Google does indeed render all pages, and it is acceptable to use JavaScript to generate content. This is the reality of the modern web, and Google must work within this framework....
Martin Splitt Feb 25, 2021
★★ How does Google query billions of pages in less than a second?
To deliver results in under a second, Google employs shard indexes that identify which index shards need to be queried for specific requests. Essentially, this is a map between keywords or tokens foun...
Gary Illyes Feb 23, 2021
★★★ Is it true that Google indexes the Shadow DOM?
Google's web rendering service is capable of seeing and indexing content located inside the Shadow DOM of web components. Google's rendering correctly handles these elements for indexing, unlike some ...
Martin Splitt Feb 23, 2021
★★★ Does Google Really Consider the Total Number of Backlinks a Ranking Factor?
John Mueller explained during a webmaster hangout that the total number of backlinks a page receives is not a relevant criterion for measuring its popularity: "From my point of view, I would tend not ...
John Mueller Feb 22, 2021
★★★ Can a Site Penalized by Google Ever Really Get Reindexed?
John Mueller indicated on Reddit that Google never permanently deindexes a site guilty of methods that don't follow its guidelines: "Sites are not permanently removed from Google - there is always a w...
John Mueller Feb 22, 2021
★★ Can the disavow file actually harm your site?
The disavow file is a technical tool. Google looks at it and if you don’t want those links, Google removes them. It’s not something counted against your site. Google won’t say you must be a spammer be...
John Mueller Feb 19, 2021
★★★ Are PBNs really detected and neutralized by Google?
PBNs (Private Blog Networks) are a technique used by spammers to create a network of seemingly natural sites that all link to something, hoping that Google thinks that many recommend this page. Google...
John Mueller Feb 19, 2021
★★★ Should You Still Disavow Spammy Links in SEO?
In general, you do not need to disavow random spammy links pointing to your site. Google's systems are very good at understanding which links are relevant and which ones to completely ignore. This is ...
John Mueller Feb 19, 2021
★★★ Do Core Web Vitals apply to subdomains or just the main domain?
Data from the Chrome User Experience Report (CrUX) is maintained at the origin level, which means the hostname including the subdomain and the protocol. If you have different subdomains, they will be ...
John Mueller Feb 19, 2021
★★★ Is the number of backlinks really insignificant for Google?
Google does not differentiate based on the total number of links or the number of referring domains. Google views links quite differently, trying to understand what is relevant and how to weigh each l...
John Mueller Feb 19, 2021
★★ Why does Google penalize satellite pages even when they target different regions?
Having multiple domain names or pages targeting specific regions or cities that redirect users to a single page, or pages created to direct visitors to the actual usable or relevant portion of your si...
Google Feb 17, 2021
★★★ Do Short Domain Names and URLs Actually Boost Your SEO Rankings?
John Mueller explained on Twitter that using a short domain name or short URLs (number of words or characters) does not provide any "bonus" in terms of SEO....
John Mueller Feb 15, 2021
★★★ Should You Remove User Comments from Your Pages to Boost SEO?
John Mueller explained during a webmaster hangout that if you remove user comments from a web page, there will inevitably be an impact on the page's ranking: "From our perspective, we consider comment...
John Mueller Feb 15, 2021
★★★ Merging and splitting sites: Why does Google never guarantee a stable ranking post-migration?
During migrations involving site mergers or splits (as opposed to a simple domain move), temporary and long-term ranking fluctuations are expected. The outcome may be stronger or mixed. Google needs t...
John Mueller Feb 12, 2021
★★★ Is removing URL parameters for Googlebot actually cloaking without a penalty?
Serving pages with URL parameters removed only for Googlebot is technically considered cloaking. However, from a practical perspective, this will not cause manual action by the webspam team, but compl...
John Mueller Feb 12, 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.