Pay or Cost per click is a famous advertising form on the World Wide Web consumed by the websites, in which advertisers gives money to their host only in case their ad is pressed. With the development of search engines, advertisers just define the keyword phrases relevant to their target market. Content sites commonly charge a settled cost per click.

Cost per click (CPC) is the sum of cash an advertiser proposes to search systems and other Internet engines just for one click on their advertisement that brings one visitor to their website.

Disadvantages of pay per click marketing: This marketing service is not for free and so one needs a separate budget. It can be a big disadvantage for all small business owners, and those who are starting with lower budgets. With a prepaid budget there is no guarantee for the advertiser that the paid click produces "bottom-line" actual results.