CPA is one of the most popular methods of making money online through your website, blogs, or newsletters. 
 
This strategy is a bit different from the Adsense program where one is paid when a visitor clicks on an advertisement. CPA often requires specific action. 
 
As you will discover while learning the ins and outs of CPA campaigns, the more actions required from a user typically equates to a higher potential to earn. 
 
For example...