How does a PayPerClick site work?

[zan15]

Can anyone guide me the working of a PPC site? I understand the concept of advertisers and publishers but fail to understand that how a PPC site decides which ad to be displayed on which publisher site if there are 10 sites from the same category...

Thanks in advance. :)

[menotin]

Read this

http://www.seoconsultants.com/articles/1383/pay-per-click-programs.asp

Basically the more you pay for the keyword the more likely you are to get the top site of that ten.