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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★★ Does mobile-friendliness really have measurable objective criteria?
There is no objective measure to determine whether a page is mobile-friendly or not. Different tools may have different criteria (for example, the size of clickable areas). For Google SEO, use the mob...
John Mueller Dec 04, 2020
★★★ Do keyword-rich TLDs (.seo, .shop, .paris) really enhance your SEO?
Google treats all new TLDs (top-level domains) such as .club or .tools exactly like any generic domain such as .com. There is no additional SEO value in having keywords, city names, or country names i...
John Mueller Dec 04, 2020
★★★ Are Longer Link Anchors Actually Better for SEO Than Short Ones?
John Mueller explained during a hangout that providing a long link anchor could be a good thing because it gives more contextual information about what the target page offers and this may potentially ...
John Mueller Nov 30, 2020
★★ Are iFrames really crawled by Google, or should you avoid them for SEO?
When it comes to content loaded via iFrame, Google can sometimes read it and sometimes not. If you want the content to be associated with your site, implement it directly on the page or via JavaScript...
John Mueller Nov 27, 2020
★★★ Should you really delete your disavow file or risk a manual action?
If you delete your disavow file, all those links will once again be treated as normal links. The Web Spam team could then review the site and take manual action if the links are problematic and there ...
John Mueller Nov 27, 2020
★★★ Should you really stop using the URL Inspection Tool to get your pages indexed?
The URL Inspection Tool is fantastic for urgent situations where an error needs to be quickly resolved, but it shouldn't be used for regular updates or adding new content. Using this tool for routine ...
John Mueller Nov 27, 2020
★★★ Does the cached page truly reflect what Google indexes?
The cached page is a technical copy of the fetched HTML, not a representation of what is actually indexed. To check indexing, use the URL Inspection Tool. JavaScript may not execute on cached pages as...
John Mueller Nov 27, 2020
★★ Could your deleted resources be harming your pre-render indexing?
When using cached pre-render solutions, it is essential to keep old versions of assets (JavaScript, CSS) available long enough to prevent the cached HTML from referencing resources that no longer exis...
Martin Splitt Nov 25, 2020
★★ Does AJAX really work for SEO, or should you think twice before using it?
AJAX requests add complexity to SEO because they create more potential failure points (robots.txt, network errors, etc.). While they work if correctly implemented, they are not fantastic for SEO and r...
Martin Splitt Nov 25, 2020
★★★ Why does Google display empty pages even when your JavaScript site is working perfectly?
If a JavaScript request to an API (like /api/cats) is blocked by robots.txt, Googlebot will not be able to load it even if it works in browsers. Browsers ignore robots.txt, but Google respects it, whi...
Martin Splitt Nov 25, 2020
★★★ 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
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