PPC or Pay per Click Advertising is an internet marketing service that many of the major search engines, like Google, offer. Advertisers can place ads that will appear based on certain search criteria. PPC works through a bid system. Several advertisers may want their ad to appear when a user searches for a particular term. Who ever has bid the highest will have their ad shown. It follows that the more your ad appears the more visibility you will receive. For this reason, it is important to have an adequate budget for your PPC advertising.