CPA, or Cost per Action, is a popular payment model in affiliate marketing. A Publisher or marketer receives payment only when a predefined action is successfully completed. These actions can include a purchase, a sign-up, or a download. This model guarantees fair and transparent billing, as costs are directly tied to the actual performance.

In affiliate marketing, CPA enables efficient collaboration between Advertisers and Publishers alike. Advertisers benefit by only paying for actual results, while Publishers can boost their earnings through targeted actions. This performance-driven approach increases the effectiveness of marketing campaigns and reduces waste.

Especially in today's digital world, the CPA model offers a clear and understandable framework to build partnerships and make success measurable. It fosters trust between all parties involved and supports sustainable growth in affiliate marketing.

Overall, CPA is a straightforward and practical payment principle that offers many advantages in online marketing thanks to its focus on goals and transparency.