Pay per click advertisements are one of the best revenue models for companies which want to run an online business. The concept of pay per click is behind the enormous success of Google in the form of its Adwords campaign. It comes with a number of incentives for the people who host advertisements as well as for the people who provide advertisements. The main reason that advertisers like PPC is that you only get to pay if you receive visitors. Similarly if you have a website and you host PPC ads, you get a cut in the ad agency earning for every earning you provide.