Wikipedia:Tip of the day/May 15, 2006
A redirect is simply a page that takes the user to the page that the author of the redirect thought was most likely what a user would be looking for if he or she typed in the name of the redirect. Redirects are used for abbreviations, misspellings, accents, capitalisation, nicknames, synonyms, scientific names, plurals, &c. To create a redirect, type in the address of the page you want to create and choose to "start the (pagename) article." To create the redirect, type #REDIRECT [[Foo]] to make it redirect to Foo.
Read more: Wikipedia:Redirect