CPM
Original book (April 2020) · p. 13
The most common pricing model is the hardest to understand for newcomers to the ad industry.
“M” stands for “1,000,” as in the Roman numeral. CPM is written longhand as “cost per thousand impressions.”
It can’t be CPI because that would denote merely the cost per impression, as in a single impression. A single impression is typically not worth much to the buyer (and it’s worth less to the seller).
CPM prices can range anywhere from pennies to hundreds of dollars. Advertisers pay more for better targeting; the coveted audience of Women’s Wear Daily will allow that outlet to command higher CPMs than a random page on a mass media property.