Guys I'm a bit new to CPA, and am trying to monetize my sites with this concept. During my search among enormous amount of CPA offers I've found out that some of them only allow a certain type of promotion/traffic. I did a quick search and have found out what incentivizable, Email and Coreg are. However still cannot figure out what are the meanings of Download, Display, Search, Social Media and Contextual. Can any of you guys explain the difference between these phrases?