PPC affiliates get paid when someone clicks on the affiliate product link irrespective of sales or lead. The PPC affiliates are only responsible for creating keyword-based campaigns and their only goal is to get more people click on the links. Even without a website to start with, affiliates can start earning by setting up lucrative PPC campaigns. Google AdWords is one of the most popular PPC programs used by affiliates. Merchants will benefit from increased exposure as affiliates develop marketing campaigns based on trademarked keywords. Affiliates must have extensive knowledge of keyword research to create successful PPC campaigns.