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 5 questions

Less than a minute. Find out how much you really know about Google search.

🕒 ~1 min 🎯 5 questions
★★★ Is it really necessary to return a 404 for expired listings, or are there smarter alternatives?
For expired listings on a classified ad site, the best practice is to return a 404 code so that these pages naturally disappear from Google's index. Using a 301 redirect to a parent category can be pe...
John Mueller Apr 08, 2016
★★★ Does a redirect also transfer link penalties to the new domain?
Link issues affecting an original site are transferred to the new domain in the case of a redirect, as the PageRank is redirected to the new site....
John Mueller Apr 05, 2016
★★★ Why does it take Google up to a year to process all redirects after a domain migration?
After a domain change with correct redirects, there can still be many old indexed URLs. It may take up to a year for all the redirects to be followed....
John Mueller Mar 24, 2016
★★★ Why does Google sometimes overlook your canonical tags?
Google may ignore rel=canonical if the pages are clearly different or if the query specifically matches the content of the non-canonical version. Google shows the exact searched URL even if a redirect...
John Mueller Mar 24, 2016
★★★ Is it true that Google really respects the canonical tag?
The rel=canonical tag is a signal for Google, indicating a preference for indexing a different URL. Google must first index and process the page to see the rel=canonical tag. There is a possibility th...
John Mueller Mar 11, 2016
★★★ Should you really delete or redirect obsolete product pages?
If a product is no longer sold, it is advised to return a 404 error for the corresponding page. If a similar product has taken its place, a redirect to the new product is recommended....
John Mueller Mar 11, 2016
★★★ Should you really keep your 301 redirects forever?
Ideally, 301 redirects should be maintained permanently, but in practice, they can be removed after about a year, once Google has had the chance to process them correctly and transfer the 'SEO juice' ...
John Mueller Mar 10, 2016
★★★ Does aligning canonical signals really guarantee the indexing of your preferred URLs?
For Google to know which URL to display in the results, it is essential to ensure that all signals, such as canonical tags, redirects, and internal links, are properly aligned to designate the preferr...
John Mueller Mar 10, 2016
★★ Absolute or relative links: which one should you choose to optimize your SEO?
Both types of links, absolute and relative, can be used without negative impact on SEO. However, absolute links may offer more clarity during a site's restructuring or migration, as they directly poin...
John Mueller Mar 10, 2016
★★★ Are JavaScript and Meta Refresh redirects really a problem for Google's crawling?
Google does not actively follow redirects that are not clearly defined, such as JavaScript or Meta Refresh redirects. If you receive alerts about redirect errors, ensure they are configured server-sid...
John Mueller Mar 10, 2016
★★★ Why do your traffic data disappear after migrating to HTTPS?
When a site migrates to HTTPS, data no longer appears in Search Console unless the HTTPS site is also verified. Search Console treats the HTTPS migration as a domain change....
John Mueller Mar 08, 2016
★★★ Do 301 and 302 redirects really affect PageRank?
Both 301 and 302 are primarily used to redirect users. The preference is to determine which URL Google should index, but this does not directly degrade PageRank. It is important to use consistent sign...
John Mueller Feb 26, 2016
★★★ Is your HTTPS migration failing in Search Console?
During an HTTPS migration, it's crucial to check the HTTPS version in Search Console to ensure that traffic and impression data are accurately counted. Common issues include incorrect redirects and mi...
John Mueller Feb 23, 2016
★★★ Is it true that migrating to HTTPS still loses PageRank with a 301 redirect?
Transitioning from HTTP to HTTPS with a 301 redirect should not cause any loss of PageRank. The consideration of HTTPS as a ranking signal is used as a tiebreaker....
John Mueller Feb 12, 2016
★★★ Does a 302 redirect really dilute PageRank?
302 redirects allow PageRank to be maintained on the destination URL or the source URL, but they enforce the indexing of the final content visible after the redirect....
John Mueller Feb 12, 2016
★★★ Do blocked redirects by robots.txt really break your links?
Google can track redirects and consider links that include parameters. However, if the redirects pass through a section of the site blocked by 'robots.txt', Google will not be able to follow them. Mak...
Google Jan 28, 2016
★★★ Why does a domain redirect bring your traffic crashing down for months?
When you redirect one domain to another, for instance, changing a .ca to a subfolder of a .com, this is considered a site merger. Rankings may fluctuate for some time as Google understands the new sit...
John Mueller Jan 26, 2016
★★★ Are your mobile-to-desktop redirects silently damaging your SEO?
An incorrect redirect involves any redirect that does not lead to an m-dot or www equivalent when dealing with a site structure featuring both versions. This includes redirects that change from the ho...
Google Jan 21, 2016
★★★ Why does a website redesign cause your Google rankings to drop even without any technical errors?
Website redesigns can affect rankings because our systems need to relearn the architecture and internal relationships of pages....
John Mueller Jan 15, 2016
★★★ Should you upload two disavow files during an HTTPS migration?
In the event of an HTTPS migration, upload your disavow file for both the HTTP and HTTPS versions to ensure that all problematic links are correctly disavowed during the transition....
John Mueller Dec 29, 2015
🔔

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.