Pay per click advertising, or PPC, is not very difficult to understand. Search engines like Google, Yahoo and Bing provide listings on a per-bid basis. This is in addition to their natural search results, which are powered by a combination of keywords and other formulas that are closely guarded by them. This type of advertising is sold by auction. You have to bid for what you pay per click to the website that has your ad, and the visitors from that website click on the link and land on your website....