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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★★★ Why Is Keeping the Same URL as Long as Possible Crucial for Your SEO?
The same John Mueller, always on Twitter, has "really recommended keeping the same URL for a web page for as long as possible."...
John Mueller Jul 29, 2019
★★★ Does Google Really Treat Redirect Loops as 404 Errors?
John Mueller explained on Twitter that Google ignores links that generate redirect loops (example: URL A redirects to URL B, which itself redirects to URL A, thus creating an infinite loop). These URL...
John Mueller Jul 29, 2019
★★★ How Long Does a Successful SEO Migration Actually Take?
John Mueller mentioned during a webmaster hangout that if everything was done properly on a website, a migration could be very quick in terms of SEO, in the order of a few days (a day or two, accordin...
John Mueller Jul 02, 2019
★★★ Does a 301 Redirect from a Low-Quality Page Penalize the Destination Page?
John Mueller explained in a webmaster hangout that if page A, offering low-quality content, is ultimately redirected to page B, which is of good quality, this will not negatively influence B.......
John Mueller Apr 02, 2019
★★★ Does Buying an Expired Domain for SEO Really Work?
A Googler explained on a webmaster help forum that "Google understands when domains change owners, so the site won't necessarily rank for the queries it used to rank for before the ownership change." ...
Google Jan 28, 2019
★★★ Can Switching Hosts or Migrating to a CDN Tank Your Google Rankings?
John Mueller indicated on Twitter, in response to a specific case of a company that migrated its site to Cloudflare and saw its rankings drop, that this case was merely speculation and that a hosting ...
John Mueller Dec 17, 2018
★★★ Why Does Google Ignore Your Canonical Tags Despite Proper Implementation?
A Googler indicated on a webmaster forum that even if canonical tags were properly integrated on a website, other signals such as inconsistent redirects could hinder their consideration by the search ...
Google Dec 10, 2018
★★ Do 301 Redirects Between Unrelated Pages Really Lose All Their PageRank?
John Mueller provided more information during a hangout on how a 301 redirect passes "link juice" (PageRank) from one page to another. He initially indicated, as was already known, that 301 and 302 re...
John Mueller Nov 05, 2018
★★★ Why Will the Mobile First Index Transition Take Several More Years to Complete?
John Mueller explained during a hangout that even though many webmasters have received messages in recent days indicating that their site has been validated in the Mobile First Index (MFI), the migrat...
John Mueller Sep 24, 2018
★★★ Should You Really Exclude All Redirected URLs from Your XML Sitemap?
John Mueller has said it repeatedly in the past: when you create your XML Sitemap files, don't include any redirected URLs (301 or otherwise). He reiterated this on Twitter recently. Google uses this ...
John Mueller Sep 03, 2018
★★★ Should You Really Redirect All Old URLs to the Homepage During a Migration?
John Mueller had already said this in the past. He reiterated it once again in a hangout: redirecting all the old URLs of a site to the homepage (particularly during a migration with massive changes t...
John Mueller Sep 03, 2018
★★★ Which HTTP Redirect Should You Use During HTTPS Migration to Preserve Your SEO?
John Mueller indicated during a hangout that "Google strongly recommends 301 redirects during an HTTPS migration", and therefore to move URLs from HTTP to HTTPS, when he was asked about 302 or 303 red...
John Mueller Aug 27, 2018
★★★ Should You Really Force Google to Crawl Faster During an HTTPS Migration?
Gary Illyes indicated on Twitter that, in the case of an HTTPS migration, there was no reason to implement specific actions to obtain faster crawling from Google. The migration will be taken into acco...
Gary Illyes Aug 20, 2018
★★★ Should You Notify Google About Site Migrations or Redesigns for Better Crawling?
John Mueller, this time on Twitter, explained that Google does not need a tool allowing webmasters to inform the search engine of major changes to a site, such as during a migration or massive redesig...
John Mueller Jul 23, 2018
★★★ How Long Should You Really Wait After a Website Merger or Split?
John Mueller reminded us in a hangout that when multiple sites merge or "split" (one site broken into several different ones), it can take quite a long time for the search engine algorithms to fully p...
John Mueller Jun 11, 2018
★★ Should You Keep the Same URL or Create a 301 Redirect When Updating Content?
When an internet user asked about replacing old content with new content on a website, John Mueller explained that it's better to keep the same URL and change the content of that page rather than redi...
John Mueller May 09, 2018
★★★ Should You Really Avoid Redirects in Hreflang Tags at All Costs?
John Mueller reminded us on Twitter that URLs specified in Hreflang tags should not be subject to 301, 302 or any other type of redirect. In other words, they must return a 200 code and not be redirec...
John Mueller Apr 23, 2018
★★★ Should You Really Worry About 404 Errors in Search Console?
John Mueller released a new "SEO Snippets" video in which he answers a question about 404 errors that may appear in Search Console and correspond to an old version of a website. John explains that the...
John Mueller Mar 26, 2018
★★★ Is the Meta Refresh Tag Really Effective for SEO Redirects?
Google has indicated several times in the past that redirections using the "meta refresh" tag should not be used. However, John Mueller mentioned on Twitter last week that it does work anyway, but is ...
John Mueller Mar 05, 2018
★★★ Why Do Site Mergers and Splits Take Google So Much Longer to Index?
John Mueller explained on Twitter that when a website splits into multiple information sources (splitting into several domain names) or conversely, when several sites merge into one, the processing by...
John Mueller Jan 22, 2018
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