Search Engine Marketing is a type of website marketing that involves buying advertising space on Search Engine Results pages. Because of the high volumes of traffic through search engines, an effective SEM campaign can be one of the best practices in online marketing. One popular form of search engine advertising is the Google AdWords PPC (Pay Per Click) program. This program allows website owners to bid like an auction for their advertisement to appear in the "Sponsored Link" section of Google results which contain a link to your site. When customers follow the links to your website you will be charged a fee.