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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★★★ What impact can changing your site's design or content have on your rankings?
Any change on a site (adding or removing text, modifying internal linking, changing the layout with different headings) must be reflected in the rankings. Retaining the URLs makes migration easier as ...
John Mueller Dec 11, 2020
★★★ Do redirects really outweigh the HTTPS signal when it comes to choosing the canonical URL?
A redirect (301 or any other type) carries significantly more weight in the canonicalization process than whether a page is on HTTPS or HTTP, as the user will ultimately see the destination of the red...
Gary Illyes Dec 10, 2020
★★★ How does Google choose the canonical URL among more than 20 signals?
Google uses over 20 different signals to determine which page should be selected as the canonical URL in a cluster of duplicates. These signals include content, PageRank, HTTPS, sitemaps, and redirect...
Gary Illyes Dec 10, 2020
★★ Could ad-blockers be undermining your canonicalization?
Ad-blocker scripts can sometimes redirect to a central page with a rel canonical tag, which can trigger canonicalization issues depending on how Google crawls the site. These redirects can be detected...
John Mueller Dec 04, 2020
★★★ Should you use the address change tool when switching from m. to www.?
There is no need to use the address change tool in Search Console when transitioning from mobile URLs (m.site) to desktop URLs (www). Google will automatically detect the redirects. The tool is meant ...
John Mueller Dec 04, 2020
★★ Why is Google shifting from Webmasters to Search Central?
Google has changed the name from Google Webmasters to Google Search Central to reflect the diversity of roles involved in the success of websites. All content for site owners is being migrated to a ce...
John Mueller Nov 25, 2020
★★★ Should you really choose between 301 redirect and canonical for merging two sites?
To merge two sites, Google recommends the 301 redirect if the goal is purely SEO and a complete cleanup. The canonical is preferable if you want to keep the old site active for reasons other than SEO....
John Mueller Nov 13, 2020
★★★ Do you really need to choose between a 301 redirect and a canonical tag to merge two sites?
To merge two sites, a 301 redirect is recommended if the goal is purely SEO-focused and about cleaning everything up. The canonical tag allows for keeping the old site active while concentrating SEO e...
John Mueller Nov 13, 2020
★★ Why does Google still show the old domain in site: queries after a 301 redirect?
When performing a site: query for a domain that redirects, Google may show the old site because the systems are trying to display what you're specifically searching for. This link can persist for many...
John Mueller Nov 13, 2020
★★★ 301 Redirect or Canonical for Merging Two Sites: What's the SEO Difference?
To merge two websites, use a 301 redirect if you want to completely combine the sites and clean up the old one. Use the canonical if you want to keep the old site active for reasons other than SEO whi...
John Mueller Nov 13, 2020
★★★ Why does a website redesign cause rank drops even without content changes?
If the site's structure, content, or URLs change during a redesign, it will affect ranking because Google will need to re-gather signals. A strictly identical copy (same URLs, same content) will have ...
Martin Splitt Nov 11, 2020
★★★ Does migrating to JavaScript really affect SEO rankings?
If the structure, content, or URLs change during a migration to JavaScript, it will impact rankings since Google will need to gather signals again. An exact copy without changes to URLs will not neces...
Martin Splitt Nov 11, 2020
★★★ Why does Google sometimes ignore your 301 redirects and choose the old URL as canonical?
Even with 301 redirects in place for a long time, Google may choose the source URL over the target URL as the canonical URL. Google uses many factors (internal links, external links, sitemaps, annotat...
John Mueller Nov 10, 2020
★★ Should you redirect WordPress attachment pages to media files for better SEO?
Redirecting WordPress attachment pages to media files likely does not impact SEO significantly, as Google typically does not index these attachment pages in a visible way. Images are indexed from the ...
John Mueller Nov 10, 2020
★★★ Should you really redirect mobile URLs to desktop based on the user-agent?
For sites with separate mobile and desktop URLs, if the mobile version appears in desktop results, you need to configure automatic redirection to the desktop version when a desktop user visits the mob...
Google Nov 05, 2020
★★★ Do 301 redirects really pass SEO juice even when the content changes completely?
301 redirects transmit signals (link juice) even if the content of the destination page is different from the original page. This is normal in the evolution of a site. The exception would be the purch...
John Mueller Oct 30, 2020
★★★ Are 301 redirects really enough during a site migration?
301 redirects are just a part of a site change. There are many more elements involved, such as internal structure, internal linking, and layouts. All these elements can affect how Google understands a...
John Mueller Oct 30, 2020
★★ Can Geolocation-Based JavaScript Redirects Really Be Crawled Safely by Google?
Modifying the URL and content during hydration based on user location is generally acceptable. Caution is necessary if rendering fails, as Google might see the server-side content. Testing is essentia...
Martin Splitt Oct 30, 2020
★★★ Why does keeping your old sites live kill your new domain?
Maintaining two old sites active with links to a new central site prevents the new site from gaining visibility as the value is not transferred. Without redirects, the new site struggles to rank and w...
John Mueller Oct 29, 2020
★★ Does Google instantly change the canonical URL after removing a redirect?
When a redirect is set up and then removed, the canonicalization algorithms do not perceive the site as deceptive. They look at the current state. Google tends to be persistent with the canonical URL ...
John Mueller Oct 29, 2020
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