CPC

Same as pay-per-click, cost-per-click is an online advertising payment model in which the publisher is only paid when a user clicks on an online ad.

Cost-per-click models are popular on search engines because the technology can target the ads based on the keywords a person used to search. For example, if I search Google on "radio stations Seattle" --in addition to the search results, a couple of sponsored links appear about "Washington State Radio Stations" and "AM, FM Station Lookup"-- these sponsored links are cost per click ads.