This term is most common as revenue per 1000 impressions (RPM). This is a very common term used for Google Adsense. And mostly every blogger is using AdSense for making money from their website. You can earn some amount with cost per click or CPC when you get some amount of money once a user clicks on an ad that is being shown on your web page. Here you have to understand the term RPM clearly. Revenue per 1000 impressions (RPM) represents the estimated earnings you can accrue for every 1000 impressions you receive. RPM does not represent how much you have actually earned; rather, it’s calculated by dividing your estimated earnings by the number of page views, impressions, or queries you received, then multiplying by 1000.