The benifits of topsites are they are already established websites with plenty of traffic, it helps your server grow.
I will run the guide using the WowServersList - topsite list.
First you put in your browser URL : WowServersList - Join
You then register, it will give you a code such as
Code:
<a href="http://www.wowserverslist.com/"><img src="http://www.wowserverslist.com/button.php?u=test" alt="WowServersList" border="0" /></a>
You put that on your website and tell your current players to vote, then more players join your server, and it keeps growing.
Enjoy,
Brian