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 Can You Successfully Migrate Your Website Without Losing Your Organic Rankings?
John Mueller provided some insights on Reddit regarding website migration. First of all, if there are changes, they will primarily come from a new CMS and/or new content, not from a domain name change...
John Mueller Jul 27, 2020
★★★ Could separating each step of a site migration save you weeks of SEO diagnostics?
During a domain merge or migration, Google recommends separating the different steps (changing the domain, URL structure, CMS, design) to easily identify the source of any potential issues. Merging co...
John Mueller Jul 24, 2020
★★★ Are mobile interstitials truly all penalized by Google?
Google penalizes intrusive full-screen interstitials on mobile. Serving a reduced interstitial (lower third) to organic visitors and a full-screen version to other channels is acceptable, provided Goo...
John Mueller Jul 24, 2020
★★ Site Restructuring: Why does Google recommend redirects over reverse proxy?
For a site structure change (subdomain to subfolder), Google recommends using standard redirects instead of a reverse proxy. Redirects are better managed and cause fewer complications. Temporary fluct...
John Mueller Jul 24, 2020
★★★ Are Multiple Redirect Chains Really Hurting Your SEO?
Redirect chains (http → www → https) do not pose a problem. Googlebot follows up to 5 redirects in a day and then continues to the next ones. Once the final URLs are known, Google focuses on them. The...
John Mueller Jul 24, 2020
★★★ Do domain migrations and mergers really cause SEO penalties?
Merging or redirecting domains does not trigger a webspam penalty. Simple one-to-one migrations stabilize quickly (a few days/weeks), but content mergers take much longer. It is recommended to separat...
John Mueller Jul 24, 2020
★★★ Should you really choose a subdirectory over a subdomain for your microsite?
For a microsite related to the main content, Google recommends a subdirectory rather than a subdomain. The subdirectory simplifies technical maintenance (CMS, redirects, Search Console, sitemap) and s...
John Mueller Jul 24, 2020
★★★ Is it true that Google ignores GDPR interstitials without penalizing your SEO?
Legally mandated interstitials (privacy policy, cookie consent) are recognized and ignored by Google, provided they are displayed over the HTML content (div overlay) and not instead of the content (re...
John Mueller Jul 24, 2020
★★ Is it true that Google advises against using reverse proxies for migrating from a subdomain to a subfolder?
To migrate from a subdomain structure to a subfolder, Google recommends using classic 301 redirects instead of a reverse proxy. Redirects are well controlled and avoid technical complexity and outage ...
John Mueller Jul 24, 2020
★★★ Do multiple redirect chains really hinder Google's crawling?
Multiple redirect chains (http to www to https) are not problematic. Google follows to the final URL and focuses on it. As long as users directly access the final URLs and the chains are not used freq...
John Mueller Jul 24, 2020
★★ Should You Avoid JavaScript Redirects for SEO?
Gary Illyes explained on Twitter that implementing redirects from one URL to another (in this case based on the visitor's IP address to redirect them to a specific site depending on the country) was n...
Gary Illyes Jul 13, 2020
★★★ Does switching JavaScript frameworks really ruin your SEO?
A simple change of technology (e.g., from Angular to Vue/Nuxt) should not affect SEO as long as the content, site structure, and URLs remain identical. Any drop in traffic observed during a migration ...
Martin Splitt Jul 01, 2020
★★ Can logged-in users be redirected to different URLs without facing SEO penalties?
It is acceptable to redirect users to different URLs based on the presence of cookies as long as Googlebot can access all content versions via links. This approach does not negatively impact SEO....
Martin Splitt Jul 01, 2020
★★ Should you really redirect Googlebot to www to bypass CORB errors?
It is technically acceptable to redirect only Googlebot to the www domain while keeping users on the non-www version to avoid CORB errors caused by a service worker. However, Martin recommends fixing ...
Martin Splitt Jul 01, 2020
★★ Should you really worry about the impact of 404 redirects on your crawl budget?
Switching from 404 to 301 or vice versa has no significant impact on the crawl budget. Google crawls 404s slightly less over time, but even for millions of pages, the difference is negligible....
John Mueller Jun 26, 2020
★★ Can 301 redirects to fix broken URLs lead to a Google penalty?
Fixing problematic old URLs with 301 redirects is a best practice that improves the site. It is never considered spam. If a ranking drop coincides with these corrections, it is probably independent an...
John Mueller Jun 26, 2020
★★★ Should you really redirect all your 404 pages that receive backlinks?
If 404 pages receive external backlinks, Google does not utilize these links (no problem). If a new page replaces the old one (e.g., a new product), redirecting the old URL is relevant for users and S...
John Mueller Jun 26, 2020
★★★ Does Googlebot really ignore cookie consent banners during indexing?
Google is capable of recognizing and ignoring legal banners such as cookie consents during indexing. If the banner is a CSS/JavaScript overlay on existing HTML content, Google can exclude it and index...
John Mueller Jun 26, 2020
★★ Is a crawlable root page really necessary for a multilingual site?
For a multilingual site, having a crawlable root page is not mandatory. Redirecting the root domain (301) to the default language version (e.g., /en) is acceptable. Using hreflang with x-default for t...
John Mueller Jun 26, 2020
★★★ Why do 404 redirects to the homepage destroy crawl budget?
Redirecting 404s to the homepage (even with a 5-second meta-refresh) is confusing for users and Google. Google treats this as a soft 404 and will continue to crawl more. It’s better to serve a genuine...
John Mueller Jun 23, 2020
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