A server side redirect is a method of URL redirection using an HTTP status code (e.g., 301 Moved Permanently, 303 See Other and 307 Temporary Redirect) issued by a web serverin response to a request for a particular URL. The result is to redirect user’s web browser to another web page with a different URL.
One method of implementing server-side redirects is the .htaccess file supported by most Apache web servers. An example of the code used is as follows.
redirect 301 /index.html http://www.example.org/index.html
Common uses of server-side redirects include:
redirecting people away from a discontinued server
redirecting to error pages if a discontinued URL is used
link use tracking, as done at the AltaVista search engine
ensuring old links and bookmarks still work when a page is renamed
allowing users to use an abbreviated URL in place of a longer (perhaps less memorable) one