what is CTR, CPM, RPM AND REVENUE?

wapdynamo-what is CTR, CPM, RPM AND REVENUE?
Google Adsense is a very popular program for earning money online. Google Adsense generate revenue on either a per-click or per-impression basis.
In this article, I will be describing some of the key terms of Google Analytics. They are Clickthrough rate (CTR), Cost-per-click (CPC), Cost-per-thousand (CPM), and Revenue per thousand impressions (RPM).