How is the CPM calculated?

The calculation of CPM, or Cost Per Mille (which means cost per thousand impressions), is determined by dividing the total cost of the advertising campaign by the total number of impressions generated, then multiplying the result by one thousand. The formula for CPM is often represented as:

CPM = (Cost / Total Impressions) x 1000.

This method provides a standardized way of measuring the cost of reaching 1,000 impressions, making it easier for advertisers to compare the cost-effectiveness of various advertising options.

In this context, the correct choice appropriately reflects this calculation, focusing specifically on impressions, which are the basis of the CPM metric, ensuring clarity on how much an advertiser is spending to reach a wide audience.