Advertising & measurement
CPM (cost per thousand impressions)
By Rubén García · 3 min
What you pay each time your ad is shown 1,000 times.
An impression is each time the ad appears on screen. With CPM you pay for those appearances, even if nobody clicks.
Example: with a €10 CPM, your ad showing 5,000 times costs €50.
CPM is mostly used to reach lots of people, not to drive direct sales.
To compare channels, also look at how many clicks and sales those impressions bring. A cheap CPM with no interested people is expensive.
Watch out: some platforms only charge for impressions that can actually be seen. Check what counts as an impression on each one.
