What does Google say about SEO? /
Redirects represent a critical technical component of search engine optimization, especially during site migrations, redesigns, or URL structure changes. This category compiles all official Google statements regarding the implementation of various redirect types (301, 302, 307, 308) and their SEO implications. Understanding Google's stance on redirects is vital for preserving page authority and rankings during structural modifications. SEO practitioners will find valuable insights on PageRank transfer, Googlebot processing timeframes, best practices for avoiding redirect chains, and context-specific recommendations (HTTPS migrations, mobile versions, international content). Google has significantly evolved its redirect handling over the years, notably regarding temporary redirects that can now pass ranking signals under certain conditions. This official documentation enables optimization of migration strategies, minimizes organic traffic loss, and ensures smooth transitions during URL changes while adhering to the search engine's technical guidelines. Whether planning a domain migration, implementing HTTPS, or restructuring site architecture, these authoritative declarations provide the foundation for making informed decisions that protect search visibility and maintain hard-earned rankings throughout technical transformations.
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★★★ Should You Really Include All Your Pages in Your XML Sitemap to Maximize SEO?
John Mueller has once again reminded us (as this has been stated several times in the past) that URLs present in the XML Sitemap file are often used by the search engine to define canonical page addre...
John Mueller Jan 15, 2018
Should You Use Search Console's "Change of Address" Tool for HTTPS Migrations?
When migrating a site from HTTP to HTTPS, it is necessary to set up 301 redirects from the old address to the new one. Oddly enough, in Search Console, the "Change of Address" function does not accoun...
John Mueller Oct 23, 2017
★★★ Can an HTTPS Migration Really Be Achieved Without Losing SEO Traffic?
Gary Illyes and John Mueller confirmed on Twitter that a migration from HTTP to HTTPS does not imply a drop in website traffic after this action......
John Mueller Oct 16, 2017
★★ Has Google Really Made HTTPS Migration Instantaneous?
Gary Illyes indicated, again at the Brighton SEO conference, that during a migration from HTTP to HTTPS, there should now be virtually no transition period (and therefore no drop) in a site's rankings...
Gary Illyes Sep 25, 2017
★★★ What Does Google Do When Your Site Sends Conflicting Canonical Signals?
John Mueller indicated on Twitter that when contradictory and/or conflicting signals are sent to Google regarding "canonical" tags (for example: an HTTPS URL containing a "canonical" tag pointing to t...
John Mueller Aug 28, 2017
★★★ Should You Use WWW or Non-WWW for Better SEO Performance?
A user asked on Twitter whether it was preferable in SEO to use a WWW address (www.yoursite.com) or not (yoursite.com) for a website. Another user replied that it had no impact on SEO. John Mueller ag...
John Mueller Aug 14, 2017
★★★ Can You Use 301 Redirects in Hreflang Tags?
We asked John Mueller whether a URL in a hreflang tag could be subject to a 301 redirect. His answer was clear: URLs in hreflang tags must be canonical. This therefore rules out the use of such redire...
John Mueller Jul 24, 2017
★★★ Should You Really Avoid Automatic Redirects Based on Visitor IP Addresses?
We've said it often on our site, and John Mueller recently reiterated it on Twitter: don't redirect your visitors to one site or another automatically based on their IP address (and therefore their ge...
John Mueller Jul 17, 2017
★★★ Should You Really Avoid Massive 301 Redirects to Your Homepage?
John Mueller indicated on Twitter that 301 redirects should primarily be used as "1:1" replacements, meaning: one URL replaces another. Otherwise, it's better to leave the URL as a 404. If you impleme...
John Mueller Jul 10, 2017
★★★ How Long Does It Really Take for Google to Process a Site Migration?
Gary Illyes explained at the SMX Advanced conference that processing a site migration (domain name change and/or URL structure change) by Google can take 3 months, depending on the site's size, and no...
Gary Illyes Jun 26, 2017
★★★ How can you properly handle 503 errors during maintenance without losing your SEO rankings?
John Mueller provided some advice on Google's Webmaster Blog if you temporarily close your site for maintenance operations: block the payment system (for example via the robots.txt file), warn visitor...
John Mueller Mar 13, 2017
★★★ Should You Use Google's URL Removal Tool During a Site Migration?
The end of the year was, it seems, prolific in somewhat bizarre questions from webmasters, as one user asked on a forum whether the URL removal option in Search Console could help during a site migrat...
John Mueller Jan 02, 2017
★★★ Should You Change Your URLs During an HTTPS Migration or Prioritize Fast Indexing?
John Mueller himself explained that it's not necessarily a good idea to take advantage of an HTTP to HTTPS migration to change URL slugs (to insert more keywords, for example), because the switch to H...
John Mueller Dec 12, 2016
★★★ How Long Should You Really Keep a 301 Redirect Active?
John Mueller said it last year: a 301 redirect should be kept in place for at least a year, if not longer. In fact, the idea is primarily to measure traffic to the old URL. As soon as it becomes zero ...
John Mueller Oct 24, 2016
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