CPA stands for Cost per Action. Generally speaking publishers that own trafficked web sites are paid by the advertiser when a visitor performs a specific action. These actions can vary, but usually include either viewing a site, filling out a form to join a newsletter or to receive information which is sometimes referred to generating leads or list building and/or buying a product. It should be noted that the advertiser will usually state which type of action he will pay for and may include payment for only one type of action or will vary payments for several types of actions that are completed.
That means you "do not need to sell" anything ... yet you can make money from these free offers.And these offers covert ...