It’s seems as if Google is just releasing update after update and product after product laterly. Just the other day Google just released their new Google Ad Manager. I haven’t tried it yet, but it looks pretty cool.
Basically what Google Ad Manager is, is a tool to allow you to manage your own ads on your website. Let me give you an example. Let’s say you sell ads on your site. The person pays you and you log into Google Ad Manager to place the ad. Google does all the ad serving. It’s actually pretty slick.
You can find out more info here. Google Ad Manager
If you have an Adsense count already you should see a link for it your account.