Pay Per Click (PPC)
Pay Per Click (PPC) advertising is a formof advertising where you pay for your results to appear on the sponsored listing section of the Search Engine Results Pages (SERP’s). These can be managed through a Google AdWords account (Yahoo and MSN have similar tools). The user designs Campaigns that consists of AdWords groups and the user can set a budget so that when a particular phrase is typed in by a searcher you pay a certain amount (depending on the competition)
The results in Google used to display the paid listings.