What do sister sites do?
The webmaster of a sister site usually stays in close contact with the other sister site webmaster. Visiting each others sites every once in awhile to check up on how things are going, offering advice and giving support are just a few things sister sites do. Also, you're required to put a link/banner somewhere visible on your page in order to show support for your sister site.

Sister Sites:




[In case you don't know who Tom Felton is, he was the kid who didn't like Harry Potter]