What does CPM mean (for the advertiser)?
CPM stands for cost per mille (that’s Latin for one thousand). It’s the price that the advertiser needs to pay for their ad to be displayed one thousand times. For example, buying 100,000 impressions at a $5 CPM would cost $500. The impressions that are purchased can run for any scheduled length of time and the total amount of impressions will be displayed evenly over the life of the campaign.