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.
Quick SEO Quiz

Test your SEO knowledge in 3 questions

Less than 30 seconds. Find out how much you really know about Google search.

🕒 ~30s 🎯 3 questions 📚 SEO Google
★★★ How does window.history.pushState affect SEO indexing?
When window.history.pushState occurs during page loading, Google treats it as a redirect. The modified URL is the one Google considers for indexing. However, server-side redirection remains preferable...
John Mueller Aug 28, 2021
★★★ Does Google Really Keep Testing Your Old 301 Redirects for Years?
John Mueller explained on Twitter that when a redirect is set up, the search engine will try for years, again and again, to test them to see if they are still in place: "We have a long memory. I think...
John Mueller Aug 23, 2021
★★★ Why Does Google Only Index 80% of Your Website's Pages?
John Mueller explained during a webmaster hangout that it was common for Google to index - as an example - only 80% of a website's content (and therefore refuse to index 20%). This can stem from the o...
John Mueller Aug 23, 2021
★★ Why does Google take time to update URLs after migrating from AMP?
After migrating from AMP to non-AMP, it’s normal for AMP URLs to continue showing up in mobile results for 4 weeks or more. Google has learned a matching model between AMP and non-AMP versions that ta...
John Mueller Aug 20, 2021
★★ Should you redirect malware-infected pages to the homepage after an attack?
After a malware attack that creates thousands of pages, using 404 pages or redirecting to the homepage produces similar results. Redirects to the homepage are treated as soft 404s. The key is to focus...
John Mueller Aug 14, 2021
★★★ Why doesn’t removing a redirect boost your SEO?
When you redirect a page, Google transfers the signals to the new URL. If you then remove the redirect, you will have two distinct pages that rank individually. You cannot artificially double your SEO...
John Mueller Aug 06, 2021
★★★ Should You Really Delete Your 301 Redirects After One Year?
Gary Illyes indicated on Twitter that if you have set up a redirect from URL A to URL B for at least one year, after this timeframe, Google's processing of the redirect will become permanent, even if ...
Gary Illyes Aug 02, 2021
★★ Is it true that migrating your domain for keywords could backfire on your SEO efforts?
Migrating to a new domain just for the sake of adding keywords generally creates more problems (migration complexity) than potential benefits. The domain name is not a strong ranking factor....
John Mueller Jul 23, 2021
★★ Why does Google recommend using a JavaScript banner instead of geographic redirections?
To let users know that a local version exists, Google recommends using a JavaScript banner instead of a redirection, as redirections complicate crawling from a single location....
John Mueller Jul 19, 2021
★★★ Why Are 307 and 308 Redirects Misunderstood by Most SEO Professionals?
Google's official documentation on redirects has been updated with information that can sometimes be useful: 308 redirects are treated by the search engine as 301s (permanent redirect) and 307s as 302...
Google Jul 19, 2021
★★ Why can't you redirect and not redirect a URL at the same time?
You can't redirect a URL and not redirect it at the same time. With redirection, Google transfers the signals. Without redirection, the pages remain separate. Changing the site's structure requires ti...
John Mueller Jul 09, 2021
★★★ Why Aren't 301 Redirects Always Enough for SEO?
With a 301 redirect, Google transfers a significant portion of signals from the old URL to the new one. However, the performance also depends on the relevance of the content and other on-page factors ...
John Mueller Jul 09, 2021
★★★ Why are 1:1 redirects essential for a seamless domain migration?
For a domain migration, you need the simplest possible 1:1 redirects, without UTM parameters or anything else. This allows Google to properly recognize the migration and transfer all signals quickly. ...
John Mueller Jul 09, 2021
★★ Are JavaScript redirections slower to process but still valid for SEO?
JavaScript redirections are accepted by Google. They may take a bit longer to be processed than server-side redirections, but they work correctly (location in JavaScript or meta refresh)....
John Mueller Jul 09, 2021
★★★ What essential elements should you keep during a website redesign to protect your SEO?
During a redesign, it is important to keep as many elements as possible: the same URLs, internal linking, content, and layout. If these elements change without redirects, Google treats the site as new...
John Mueller Jul 09, 2021
★★ Why do old URLs still show up after a migration?
After migrating URLs, a site: search might still display old URLs even if Google has already migrated the indexing. Google aims to be helpful by showing where the content used to be located. Checking ...
John Mueller Jul 09, 2021
★★ Should you be worried about migrating to JavaScript frameworks for SEO?
Migrating to React from HTML/PHP completely changes the front end of the site, which is a significant SEO change. The effects can be positive or negative; it's not automatically a loss of ranking....
John Mueller Jul 09, 2021
★★★ Is it true that a website redesign won't automatically penalize you in Google's eyes?
There is no system at Google that automatically penalizes a site after a redesign. If multiple sites lose traffic following a revamp, it is related to the redesign method used, not an action by Google...
John Mueller Jul 09, 2021
★★★ What SEO mistakes can trigger manual actions from Google?
Manual actions can be issued for: pure spam, user-generated spam, spammy free hosting, misleading or incorrect structured data, unnatural links to or from the site, low-quality content without added v...
Google Jul 08, 2021
★★★ Should you choose rel nofollow over the PRG pattern for managing PageRank?
To prevent a link from passing PageRank, simply use rel nofollow. Do not use complex constructs like the PRG (Post-Redirect-Get) pattern that add unnecessary complexity, are hard to maintain, and prev...
John Mueller Jul 02, 2021
🔔

Get real-time analysis of the latest Google SEO declarations

Be the first to know every time a new official Google statement drops — with full expert analysis.

No spam. Unsubscribe in one click.