How Do You Increase Revenue From Your Mail List?

A lot of people think, well, i don't make money from my mail list. So we're going to go through this n make three, three steps here. First is building the mill list, and then what do you send to them? And then how do yur increase revenue sut even if people have got something on their site,. in order to grow the re mill theyre so like a lead magnet or a newsletter.