Google Ad Manager is becoming one of the most popular Ad Servers because of it's sophistication and price it's cost -- it's free!
So what is Google Ad Manager exactly and why would you want to use it? This article aims to give you a straightforward introduction.
Google Ad Manager is not to be confused with Google AdSense a service popular with bloggers who do not have their own advertising sales teams but still want to generate online advertising revenue.
If you do not already have an AdSense account Google requires you set one up but that's only so that AdSense advertising can run on your website if you haven't sold out all your advertising space. You can opt to not serve AdSense advertising at any time -- but you have to sign up for one.