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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★★★ How Many Redirect Chains Can You Have Before Hurting Your SEO Performance?
John Mueller indicated on Reddit that redirect chains should be avoided, particularly more than 5 successive redirects on a website, as Googlebot will not follow them beyond this number....
John Mueller Jan 27, 2020
★★★ Is it really necessary to redirect HTTP to HTTPS, or is the preferred domain enough?
Using the preferred domain is sufficient when a website has similar content on HTTP and HTTPS. However, 301 redirects are recommended to ensure that only the correct versions are indexed....
John Mueller Jan 24, 2020
★★★ Can redirects really be indexed in just a few days?
Redirects can be taken into account within a few days if all SEO signals are aligned. This depends on the frequency of page recrawls....
John Mueller Jan 22, 2020
★★★ Are JavaScript redirects really treated like standard redirects by Google?
JavaScript redirects are treated like standard redirects but may be slower to process. They are suitable if configured properly....
John Mueller Jan 22, 2020
★★★ Should you eliminate IP-based redirects for international SEO?
Avoid IP-based redirects as they stop Googlebot from seeing specific country versions. Prefer an informative banner to guide users to the appropriate version....
John Mueller Jan 22, 2020
★★★ Is it really necessary to redirect everything during a website migration?
When migrating a website, it is essential that all pages are redirected to the new domain. Do not keep any pages on the old domain to avoid complicating the migration process....
John Mueller Jan 10, 2020
★★★ Should you really redirect after changing your WordPress theme?
Changing a WordPress theme or altering the HTML5 structure can be recognized by Google as a change in similar content, but for clarity and accuracy of discovery, it's advisable to use redirects....
John Mueller Jan 08, 2020
★★★ Should you really maintain 301 redirects indefinitely after a domain change?
301 redirects are permanent and should ideally be maintained indefinitely after a domain change. At a minimum, keep them for one year to ensure that all URLs are properly crawled by Googlebot....
John Mueller Jan 08, 2020
★★★ Why does the URL Inspection Tool show a 200 code for a 301 redirect?
The URL Inspection Tool in Google Search Console shows a 200 code for a 301 because it displays the final result after redirection, reflecting what Googlebot sees once the redirection process is compl...
Martin Splitt Dec 30, 2019
★★★ Should you really implement a 301 redirect every time you change an URL?
When changing URLs on a website, it is strongly recommended to use 301 redirects to guide users and bots to the new pages, thereby maintaining SEO continuity....
John Mueller Dec 27, 2019
★★★ How Does Google's Machine Learning Really Determine Canonicalization Criteria Weights?
The same John Mueller explained during a webmaster hangout an example of how Google can use machine learning algorithms: "So, for example, we use machine learning for canonicalization. We have all the...
John Mueller Dec 23, 2019
★★★ Does the difference between 301 and 302 redirects really matter for SEO?
A 301 redirect is permanent, signaling that the final destination is kept, while a 302 redirect is temporary, indicating that the original URL will be checked back later. Use the appropriate type, but...
John Mueller Dec 23, 2019
★★★ Does the canonical URL selected by Google really impact your rankings?
Google uses several signals to determine the canonical URL, such as 301 redirects, canonical tags, internal and external linking, and sitemap files. Even if Google chooses a canonical URL different fr...
John Mueller Dec 13, 2019
★★★ Why does an old URL still show up in Google after a redirect?
When Google follows a redirect, the destination page is deemed valid, and an old URL might still show up in search if explicitly accessed, for example via a site:oldurl.com request....
John Mueller Dec 13, 2019
★★★ Should you really test the SEO impact of every infrastructure change with A/B testing?
Any infrastructure change, such as migrating to client-side JavaScript, requires validation through A/B testing on pages to evaluate its impact on SEO and compare performance before and after implemen...
John Mueller Dec 06, 2019
★★★ Should you really test indexability before migrating to React or another JavaScript framework?
Implementing JavaScript frameworks such as React can have a significant impact on SEO. It's advisable to conduct tests on pages before proceeding with a full migration to ensure that content remains i...
John Mueller Dec 06, 2019
★★★ How can you check if your site has switched to Mobile-First Indexing?
To verify if a page has been properly migrated to Mobile-First Indexing (MFI), check the 'Coverage' section of the Search Console. If the 'Main Crawler' is marked as 'Smartphone', this indicates a mig...
Google Dec 05, 2019
★★★ How does migrating to HTTPS affect your HTTP indexing, and what can you do to prepare for it?
When migrating to HTTPS, expect a decrease in the indexing of HTTP pages. Ensure that the SSL configuration is correct and that the redirects from HTTP to HTTPS are properly in place....
Google Dec 05, 2019
★★★ Should you really keep 301 redirects for a minimum of one year?
It is helpful to keep 301 redirects for at least a year to ensure that Google has enough time to sustainably process these changes....
John Mueller Nov 15, 2019
★★★ Do 302 redirects really penalize SEO less than 301?
A 302 redirect does not negatively affect rankings like a 301 redirect does, as it does not indicate a permanent URL change. This plays an important role in the context of temporary redirects....
John Mueller Nov 15, 2019
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