Ask any successful internet marketer and they will tell you "the money is in the list". I believe that you have also heard about it many times even if you just starting out.
The 'List', aka mailing list, are those who have opted in on the sign up form to receive emails, free gifts, or blog updates from that particular marketer.
It may seem obvious to those who have been online for some time, but there are still many websites not doing anything to capture...