Cpa Marketing is like two faces on the same coin, On one side you have “advertisers” and on the other “publishers”, a cpa network caters to both of these parties, in what way exactly i will explain further. Advertisers are those that pay to have their advert shown to a specific audience but will only pay once the visitors complete their offer or submit a form with their details such as name, email, phone number, etc.
on the other hand you have the publishers, those that promote the products/offers on behalf of the advertisers and drive traffic/visitors to the advertisers offers and will then complete offers, sign up for free samples, sign up to a newsletter, etc. after which publishers are paid for succesful actions and split commissions(advertiser payments) with the cpa network.
There's many different ways to go about cpa marketing, more advanced publishers similar to affiliate marketers will setup capture pages and build an email list of subscribers that they can then send other offers to in the future and make even more money, But most importantly make a regular income due to having a list they can email offers to any time they want and virtually print money when they feel like it!