Allows you to send traffic from www.yoursite.com/here.html dynamically to www.yoursite.com/there.html using an automatic forward

A web link point to another web link. For e.g. http://www.mydomain.com/page.asp à1/4¯font http://www.yourdomain.com/home.asp

Either server side or scripting language that tells the search engine to go to another URL automatically.

A spam tactic used to send a visitor to a different page than the one found in the search results. You can find more information on this with the Black-Hat Search Engine Positioning Tactics.