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 remove expired pages or can you leave them labeled 'expired'?
For classified ad sites with ephemeral content, two approaches are acceptable: redirecting to the category (soft 404) or returning a 404. In both cases, the page disappears from the results. You shoul...
John Mueller Mar 12, 2021
★★★ How many redirects does Google really follow before it splits the crawl?
Google follows about five consecutive redirects immediately and treats them as a single request. If a URL has more than five redirects, they are treated as separate requests....
John Mueller Mar 12, 2021
★★★ Should you really be concerned about redirect chains for Google's crawl?
Google follows a small number of redirects immediately, about five consecutive redirects, and treats them as a single request. Beyond five steps, they are treated as separate requests....
John Mueller Mar 12, 2021
★★★ Do 301 redirects really transfer 100% of PageRank and SEO signals?
When you redirect one URL to another with a 301 redirect, Google transfers all signals and links from the old URL to the new URL, including links with parameters....
John Mueller Mar 12, 2021
★★★ Do 301 redirects really transfer 100% of SEO juice without any loss?
When redirecting one URL to another, Google transfers all signals and links to the new URL. This also works if the old URL contains parameters....
John Mueller Mar 12, 2021
★★ Should you really double hreflang with JavaScript for geolocation?
Beyond hreflang, implement JavaScript detection to show a banner to American users on the European site, offering them the US version. This compensates for cases where hreflang does not work perfectly...
John Mueller Mar 05, 2021
★★★ Should you really keep 301 redirects for at least a year?
Google recommends maintaining 301 redirects for at least one year, ideally longer. After this period, Google should have crawled all old URLs with the redirect at least twice. Less significant URLs th...
John Mueller Mar 05, 2021
★★★ How can you effectively map URLs and verify redirects during migration to avoid losing rankings?
During a site migration, it is crucial to trace each old URL to its new destination, verify all redirects, and ensure that all internal signals (rel canonical, navigation, footer) point to the new URL...
John Mueller Mar 05, 2021
★★ Should you really wait for Google to switch your site to mobile-first indexing?
A site that has not yet migrated to mobile-first indexing will naturally have more desktop crawl than mobile. This is not a problem in itself, but it is essential to check if the site is ready for mig...
Google Feb 25, 2021
★★ What does the 'empty content' alert in Search Console really hide about potential redirection issues?
The 'empty content' alert in Search Console often appears when redirects or server issues prevent Google from reading the content. It's important to check server configuration and redirects....
Google Feb 25, 2021
★★★ Merging and splitting sites: Why does Google never guarantee a stable ranking post-migration?
During migrations involving site mergers or splits (as opposed to a simple domain move), temporary and long-term ranking fluctuations are expected. The outcome may be stronger or mixed. Google needs t...
John Mueller Feb 12, 2021
★★★ Is it true that the History API is really seen as a redirect by Google?
If Google detects that a page is using the History API to change the URL during loading, it classifies this as a redirect and will try to crawl and index the destination URL (the new URL) during the n...
John Mueller Feb 12, 2021
★★★ What could cause your images to vanish from Google Images despite solid optimization?
Images are not crawled as frequently as web pages, so it's important to use persistent URLs for them. When URL changes are necessary, use 301 redirects....
John Mueller Feb 10, 2021
★★★ Do 301 redirects really transfer all ranking signals without any loss?
With a 301 redirect, Google groups the old and new URLs together and transfers all signals (links, etc.) to the canonical URL (usually the destination). It's also necessary to update internal and exte...
John Mueller Feb 05, 2021
★★★ Do 301 redirects really pass on 100% of PageRank and link signals?
With a 301 redirect, Google groups the old and new URL together and transfers all signals (including links) to the canonical URL, usually the destination of the redirect. To ensure that the new URL is...
John Mueller Feb 05, 2021
★★ Is it true that Google never disconnects your old pages during a migration?
During a migration, Google does not de-index the old page before re-indexing the new one. The process works via canonical change: Google sees the redirect, checks that the content is identical, and sw...
John Mueller Jan 29, 2021
★★★ Does Google really transfer all signals in bulk during a complete site migration?
During a complete site migration, if Google can recognize that all indexable content has been moved, it transfers all signals in bulk to the new domain. This is more efficient than a partial migration...
John Mueller Jan 29, 2021
★★★ Can HTML Button Links Really Sculpt PageRank Without Google Detecting Them?
John Mueller explained in a webmaster hangout that links implemented through HTML Button code (sometimes referred to as "PRG Pattern" for "Post/Redirect/Get Pattern") are not seen and therefore not ta...
John Mueller Jan 25, 2021
★★★ Does switching from HTTP to HTTPS with 301 redirects really lose SEO juice?
A 301 redirect from HTTP to HTTPS within the same domain does not cause any loss of SEO value. This is the recommended approach for properly setting up the HTTPS version of a site....
John Mueller Jan 22, 2021
★★★ Why Does Google Flag a Redirected URL as Blocked by Robots.txt When It Actually Isn't?
SEO expert Glenn Gabe indicated on Twitter that, in Search Console, if URL A redirects to URL B which is blocked by robots.txt, URL A will be marked as also blocked by this file, even though, in reali...
John Mueller Jan 18, 2021
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