According to Wikipedia: “Cost Per Action or CPA (sometimes known as Pay Per Action or PPA) is an online advertising pricing model, where the advertiser pays for each specified action (a purchase, a form submission, and so on) linked to the advertisement. Direct response advertisers consider CPA the optimal way to buy online advertising, as an advertiser only pays for the ad when the desired action has occurred. An action can be a product being purchased, a form being filled, etc. The desired action to be performed is determined by the advertiser.”
There are several advantages of CPA affiliate marketing to someone just starting out online as a home business owner. CPA marketing is widely recognized as one of the easiest ways to make money online because of the low cost of entry into the marketplace as well as the support available from the different CPA Networks residing on the Internet.