301 redirect is used when you want to move a link permanently like you are changing your domain name. Also, you can use 301 redirects to point multiple versions of a page to the canonical version to avoid the penalty of duplicate content and to prevent link dilution, which harms search ranking.<br /><br />302 redirect is used when you want to redirect a link temporary and do not want search engines to pass link authority to the temporary destination.
The main difference between both is, 301 redirect means that the page has moved to a new location, permanently while in 302 redirects that the move is temporary. In short we can say 301 is permanent redirection and another one is temporary redirection.
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