CTR=Click Through Ration- How many people actually click on your link and hopefully go threw and interact with your site.PTR= Paid To Read- The majority of these sites you read emails

PTC= Paid To Click- The majority of these sites you will click banners on the site itself you may get a few emails but not many.

PTP=Paid To Promote-This is an option offered by some programs. You receive credits or cash for each time a specific page is shown . This can be anywhere from 50 credits/1000 to 1.25/1000

PPA=Paid Per Action- This is where you get paid to do things like filling out surveys, reviewing sites or signing up for trial offers.

TE= Traffic Exchange