Cost-Per-Acquisition campaigns are where an advertiser pays for every customer a web site brings them. For example many consumer sites will offer something free in exchange for their visitors signing up for another company's offer. These campaigns can be very powerful for building a customer list.
A payment model in which payment is based solely on qualifying actions such as sales or registrations.
or CPA Refers to the cost of acquiring a user who conducts a transaction such as a sale or registrations. It is the total cost of the campaign to bring visitors to the site divided by the number of transactions achieved through the campaign; the cost per click divided by the conversion factor.