What does eCPM stand for?

Q: What does eCPM mean in my Google AdSense account? I don't understand it.

A: eCPM stands for "Effective Cost Per Thousand." Think thousand as in one thousand millimeters making a meter, and it'll make a little more sense. It's basically telling you how much money you're making off of AdSense per thousand visits to your site. But how can this information be useful?

Well, this is primarily useful in figuring out how much you can spend to drive traffic to your site. Lets say that you have an eCPM on a site of $80, meaning you make eighty bucks per thousand visitors. If you can find a way to buy a thousand visitors to your site at $40 per thousand, then do the math and see that you're going to make money off of that investment. There are a few things you want to keep in mind with this, though: