301 Redirect SEO

How it works

A 301 redirect is an HTTP status code returned by the server when a URL has permanently moved. When a browser or search engine crawler requests the old URL, the server responds with status 301 and provides the new location. The client then automatically follows to the new URL.

The redirect operates at the HTTP level, meaning the server or CMS must be configured to return the correct status code. Common methods include server-side configuration files (.htaccess for Apache, web.config for IIS), CMS plugins, or server-side scripting. The redirect should point to the most relevant equivalent page, not just the homepage, to preserve user experience and ranking signals.

Why it matters

For SEO, a 301 redirect helps preserve search visibility when a page, folder, or domain changes. It sends users and Google to the preferred URL, consolidating ranking signals and link equity. Without a proper redirect, the old URL may become a dead end, causing lost traffic and broken user experiences. Redirects are part of broader web optimization efforts.

Google documents redirects as a way to resolve an existing URL to a different one and tell Google Search a page has a new location. However, the transfer of link equity is not guaranteed; it depends on relevance, crawlability, internal linking, and canonicalization. A poorly implemented redirect can lead to soft 404s or indexing issues. After a permanent move, update the canonical tag to reflect the new URL.

Where it changes your decision

• After a URL change: When you restructure a site or change a page's slug, a 301 redirect ensures visitors and search engines find the new location without losing accumulated authority.
• During a domain migration: Proper domain forwarding seo requires 301 redirects from every old URL to its corresponding new URL to preserve rankings and avoid losing traffic.
• When consolidating duplicate content: If you merge two similar pages into one, a 301 redirect from the duplicate to the canonical page helps consolidate ranking signals and avoid dilution.

Common mistakes

• Using a 301 redirect for a temporary change instead of a 302 redirect: This tells search engines the move is permanent, which can cause them to drop the old URL from the index prematurely.
• Redirecting every old page to the homepage instead of the closest relevant page: This frustrates users and loses the opportunity to pass specific page authority.
• Creating redirect chains or loops: Multiple redirects slow crawling and can cause search engines to stop following the chain, losing link equity.
• Leaving internal links and XML sitemaps pointing to redirected URLs: This wastes crawl budget and can create confusion for search engines.