Pay-Per-Click program are very popular form of earning money from a web site. This type of program allows you to generate income from your website. This type of program is generally based on the search result of ads they are well-matched to your site content. Basically this type of program will enhance your page and make it more useful to the visitors and they will find interest to surf those ads rather then being annoyed like pop up ads. Definitely you will earn small revenue if anyone visits those ads which are usually shown random basis totally dependent on your page content. There are many PPC program online you may choose the best one form here that suits you best.