All right, so you’ve got the addresses. Now what are you going to do with them? Obviously, what you’re going to do is send your users marketing messages via email so that they’ll know all about the great products and services you offer.
There are two ways you can do that: you can send them a newsletter every couple of weeks or so; or you can send them a sales letter. Newsletters are very important for building trust with your subscribers and warming them up to your sales offers.