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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🕒 ~1 min 🎯 5 questions
★★ 404 or noindex for deindexing: which method should you really prefer?
Using 404 or noindex to remove pages from the index produces the same final result. Noindex can be slightly faster, but the difference is negligible at the scale of a site. Choose the most practical m...
John Mueller Sep 04, 2020
★★★ Hreflang in HTML or XML Sitemap: Is There Really a Difference for Google?
For implementing hreflang, Google treats the <head> HTML tag and the declaration in an XML sitemap exactly the same. Both methods are equivalent, and the choice depends on the ease of implementation f...
John Mueller Sep 04, 2020
★★ Should you reconfigure Search Console every time you migrate from www to non-www?
When changing a prefix (www/non-www), you must verify the new property if the verification is prefix-based. Domain verification avoids this problem. Search Console is not required for the website's op...
John Mueller Sep 04, 2020
★★★ What makes Google refuse to index your pages even when you think the content is relevant?
If your URL is not indexed quickly, it is crucial to focus on creating quality content. Google does not guarantee the indexing of all pages, and indexing can be influenced by content quality and other...
Google Sep 03, 2020
★★★ Should You Include Category Pages in Your XML Sitemap?
In response to a tweet asking whether category page URLs - article or product listing pages - should be included in the XML Sitemap, Fabrice Canel (Bing) answered yes, this file should include all URL...
Google Aug 31, 2020
★★★ Do Links from Wikipedia Really Impact Your Google Rankings?
John Mueller explained on Reddit that links from Wikipedia to your site have no impact on your visibility in Google. And even more so for links created artificially and/or automatically on the online ...
John Mueller Aug 31, 2020
★★★ Should you really roll back after a site migration fails?
Before contemplating a rollback, it’s essential to diagnose the cause of the issue (missing redirects, crawl problems, technical errors). If after a month no improvement is observed, no explanation is...
Martin Splitt Aug 27, 2020
★★★ Does a domain's purchase history truly hinder an SEO migration?
The history of a domain plays a limited role in a migration. If a purchased domain has been used for spam, it is essential to clean up existing issues, possibly use the disavow file, wait for Google t...
Martin Splitt Aug 27, 2020
★★★ Does migrating to a new domain really erase SEO penalties and bad signals?
Migrating to a new domain to evade low-quality content or spammy links does not work. Google continually evaluates content, and low-quality material remains poor regardless of where it’s moved. Some s...
Martin Splitt Aug 27, 2020
★★ How long does it really take to transfer SEO signals during a migration?
The speed of signal transfer depends on the site's crawl budget, crawl frequency, and the number of external links. This can take anywhere from one day to several weeks depending on these factors. Sit...
Martin Splitt Aug 27, 2020
★★★ Does a domain migration really lead to traffic loss?
A well-executed domain migration does not necessarily result in overall traffic loss. If you simply copy the entire URL structure and content to a new domain, traffic will decrease on the old one and ...
Martin Splitt Aug 27, 2020
★★★ Should you really avoid changing everything at once during an SEO migration?
You shouldn't take advantage of a migration to simultaneously change multiple elements (URL structure, technology, content). Modifying all variables at the same time makes it impossible to identify th...
Martin Splitt Aug 27, 2020
★★★ How does Google really transfer signals during a domain migration?
When Google crawls the old site and detects the redirects, it checks that the new site is a one-to-one copy of the old one. If that's the case, signals from the old domain are transferred to the new d...
Martin Splitt Aug 27, 2020
★★★ Should you really redirect all images during a site migration?
It is essential to implement 301 redirects for all images during a site migration. Visual content is very important for SEO. Since refreshing in the image index takes time, you should monitor the serv...
Martin Splitt Aug 27, 2020
★★★ Should You Index Automatically Translated Content Without Human Review?
Gary Illyes indicated on Twitter that the official recommendation was not to index content that would be translated automatically (with software/algorithm like GPT-3) without subsequent human review. ...
Gary Illyes Aug 24, 2020
★★★ How Does Google Actually Determine the Canonical URL of Your Pages?
John Mueller provided on Twitter a list of criteria that Google takes into account to define what the canonical URL of a page is (and therefore its "canonicalization"): redirects, internal links, exte...
John Mueller Aug 24, 2020
★★★ Does the Mobile First Index Really Apply Automatically to New Websites?
Google indicated in May 2019 that starting from July 1st of that same year, all new sites discovered by the search engine's crawlers would automatically be integrated into the Mobile First Index. John...
John Mueller Aug 24, 2020
★★ Does the new structured data testing tool really take up to 30 seconds to analyze a page?
The new structured data testing tool takes longer (up to 30 seconds at times) than the old one (4 seconds) because it processes the page through the entire Google indexing pipeline, rather than just p...
John Mueller Aug 21, 2020
★★ Can a hacked site lose its crawl budget due to Google security alerts?
A hacked site with malware or phishing reported in Search Console will not see its crawl reduced. The impact is on display in the search results (warnings, filtering), not on the frequency or intensit...
John Mueller Aug 21, 2020
★★ Why is Google so tight-lipped about its indexing incidents?
The indexing incident on August 10 was resolved quite quickly, and Google has very little additional information to share publicly. The incident on August 15 appears to have been very brief. Google do...
John Mueller Aug 21, 2020
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