A 301 redirect is a permanent server-side redirect that sends users and search engines from one URL to another. It tells search engines that the old page has moved for good, and in most cases it passes the old page’s ranking signals to the new URL. If you change a page address, merge pages, or move to a new site structure, a 301 redirect helps preserve traffic and avoid broken links.
Why a 301 redirect matters for SEO
Without a 301 redirect, visitors who click an old link may land on a 404 error page, and search engines may treat the old and new URLs as separate pages. That can lead to lost rankings, weaker link equity, and a poor user experience.
A proper 301 redirect helps you:
- Keep visitors moving to the correct page
- Preserve organic visibility when URLs change
- Consolidate duplicate or outdated content
- Support site migrations, rebrands, and URL cleanup
When to use a 301 redirect
Use a 301 redirect when the move is permanent. Common situations include changing a product URL, deleting a page and replacing it with a better version, moving from non-www to www, or standardizing URLs with or without trailing slashes.
Common use cases
- Redirecting an old blog post to an updated version
- Sending discontinued product pages to the closest relevant category or replacement product
- Migrating from HTTP to HTTPS
- Combining several thin pages into one stronger page
Practical example
Imagine your page used to be /seo-basics-guide and you renamed it to /seo-basics to create a cleaner URL. If the old page has backlinks, bookmarks, and rankings, you should place a 301 redirect from the old URL to the new one. That way, users reach the updated page automatically, and search engines can transfer most of the old page’s SEO value.
This is especially important for businesses updating service pages, ecommerce product URLs, or blog content that already earns traffic.
301 redirect best practices
- Redirect to the most relevant new page, not just the homepage
- Avoid redirect chains, where one redirect leads to another
- Update internal links so they point directly to the final URL
- Keep important redirects in place long enough for users and search engines to adjust
- Test redirects after launch to confirm they return a true 301 status code
For beginners, the simplest rule is this: if a page moves permanently, set up a 301 redirect immediately. It protects rankings, improves usability, and makes site changes much safer.