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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★★★ How do your failing APIs sabotage your Google indexing?
If an API fails during rendering, Google may not see the content coming from the API and could potentially group different URLs into duplication clusters due to those failures. It is crucial to have m...
Martin Splitt Nov 25, 2020
★★★ How long does Google really wait before giving up on JavaScript rendering?
Google does wait a certain amount of time for JavaScript rendering, but it's essential to optimize for users above all. If the rendering takes tens of seconds, it's already problematic. Some sites tak...
Martin Splitt Nov 25, 2020
★★★ Does Google really render all JavaScript pages, regardless of their architecture?
Google renders virtually all pages. The fact that part of the content is rendered on the server and another on the client does not influence Google's decision to render the page or not. There is a heu...
Martin Splitt Nov 25, 2020
★★★ Does Page Experience really change how websites rank on Google?
The Page Experience ranking factor, including Core Web Vitals, will be active in Google Search starting May 2021. Although there is still time, it is recommended to act quickly as improving site speed...
John Mueller Nov 25, 2020
★★★ Does Google really catch duplicate content after JavaScript rendering?
Google computes content hashes on the initial HTML for deduplication, but subsequently compares these hashes with those obtained after JavaScript rendering. The final decision regarding duplication an...
Martin Splitt Nov 25, 2020
★★ Has dynamic prerendering become a trap for indexing?
Dynamic prerendering solutions like prerender.io add latency, can crash, and require caching. If hashed JavaScript or CSS resources in the name become inaccessible due to outdated cache, the content m...
Martin Splitt Nov 25, 2020
★★★ How long does Googlebot really wait for JavaScript rendering?
There is no specific deadline that Googlebot expects for JavaScript rendering. The recommendation is to render content as quickly as possible. If loading takes several seconds, it is already problemat...
Martin Splitt Nov 25, 2020
★★★ Is it true that Google actually limits CPU time during JavaScript rendering?
Google limits CPU time during JavaScript rendering, primarily to detect infinite loops and faulty code. Optimization should focus on user performance rather than a specific technical limit, as these t...
Martin Splitt Nov 25, 2020
★★ Are GET APIs really cached by Google just like any other resource?
Google caches resources fetched from APIs in the same way as other resources if they use the GET method. However, POST requests are not cached....
Martin Splitt Nov 25, 2020
★★ How can you measure Core Web Vitals on Firefox and Safari without native API support?
For browsers that do not support Core Web Vitals APIs (Firefox, Safari), Martin Splitt recommends using development tools to collect lab data. He particularly suggests monitoring frame timings to aim ...
Martin Splitt Nov 25, 2020
★★★ Why does Google require full access to embedded resources to properly index your pages?
For rendering, Google's services must be able to access embedded content such as JavaScript files, CSS, images, videos, as well as responses from APIs used on the pages....
John Mueller Nov 19, 2020
★★★ Is it true that Google's Web Rendering Service really indexes what users see?
The Web Rendering Service (WRS) is used by Googlebot to display pages like a browser, allowing it to index all the content in the same way that users see it....
John Mueller Nov 19, 2020
★★★ Does cutting down on embedded resources really boost speed and enhance crawling?
Reducing embedded resources generally makes pages faster for users, thereby improving both crawling and user experience....
John Mueller Nov 19, 2020
★★★ Do Expired Domains Still Work for SEO in 2024?
John Mueller discussed the use of expired domain names in SEO during a hangout. He explained that Google is well aware of all this, and the way some people use expired domains for more or less justifi...
John Mueller Nov 16, 2020
★★★ Can the same site really appear 7 times on the same SERP?
Google does not have a strict restriction on the number of times a site can appear in search results. The same site can show up 5, 6, 7 times or more if it is relevant to the user. The goal is to redu...
John Mueller Nov 13, 2020
★★★ Can one website really dominate the entire first page of Google?
Google does not have a strict restriction on how many times a site can appear in search results. The same site can appear 5, 6, 7 times or more if it makes sense for users. The June 2019 update aimed ...
John Mueller Nov 13, 2020
★★ Why does Google still show the old domain in site: queries after a 301 redirect?
When performing a site: query for a domain that redirects, Google may show the old site because the systems are trying to display what you're specifically searching for. This link can persist for many...
John Mueller Nov 13, 2020
★★ Does Google really restrict how many times a domain can appear in search results?
Google has no strict restriction on how many times a site can appear in search results. The June 2019 update aimed to reduce, not eliminate, multiple appearances of the same domain....
John Mueller Nov 13, 2020
★★ Does Google really impose an indexing delay based on the quality of your pages?
Google does not have an intentional delay between indexing a page and displaying it based on quality or mobile usability issues. If the content is in pure HTML, it is indexed immediately after crawlin...
John Mueller Nov 13, 2020
★★★ Is Google indexing really instantaneous, or are there hidden delays?
Google imposes no delay between indexing and displaying a page based on quality or mobile usability issues. If the content is in HTML, it is indexed immediately after crawling. JavaScript rendering ma...
John Mueller Nov 13, 2020
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