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SEO Glossary - 3
301 Redirect
301 Redirect is a response code that is served by a web server when a web page has been permanently moved from one location to the other.
The response will also include the path to the new webpage address the page has moved to.
In SEO a 301 redirect indicates to Google that it should forward all ranking signals (including backlinks) from the old address to the new address.
A browser such as Chrome will automatically follow the 301 redirect and serve content from the new page location.
302 Redirect
302 Redirect is a response code that is served by a web server when a web page has been temporarily moved from one location to another.
The response will also include the path the new webpage that the page has temporarily moved to.
In SEO a 302 redirect indicates to Google that as the move is temporary it should not forward all ranking signals to the new page. However, it’s not always quite that simple, Google will sometimes decide to treat a 302 redirect as if it was a 301 redirect, amongst other scenarios this can happen if a 302 redirect is left in place for a long time.
Ideally only use a 302 if it really is a temporary move and remove it as soon as you possibly can.
A browser such as Chrome will automatically follow the 302 redirect and serve content from the new page location.