“What is eCPM? What affects my eCPM? What can I do to earn a higher eCPM?”

Effective cost per thousand impressions (eCPM) is the amount of revenue you can expect to earn from AdSense for every 1000 impressions shown on your site. Since eCPM helps you measure how well your ads are performing, we often hear questions from publishers about the factors that impact this metric and how it relates to their earnings. If you're using the new interface, you'll see that your reports show RPM (revenue per thousand impressions); RPM is just another term for eCPM, and it's calculated the same way, so we use these two terms interchangeably.

To help provide some clarity, we’re kicking off a two-part video series with more insights into how eCPM is calculated in order to help you maximize earnings. With the help of AdSense optimization specialist, Matthew Carpenter Arevalo, we’ll show you the factors that affect eCPM, how to track user behavior and traffic patterns, and what you can do to improve your website performance.

In the video below, Matthew will introduce you to the basics of how eCPM is calculated and explain how to analyze the causes behind any changes in your eCPM.

If you’d like to learn more about eCPMs visit our Help Center.

Stay tuned for Part 2 to learn what you can do to better understand and optimize your website’s eCPM.