The idea of an ad impression was created about a hundred years ago and from the beginning, it meant different things in different media. But in all cases, it always related to counting up the number of opportunities a media buy gave the advertiser to pitch a consumer. This allowed a way of weighing one media buy against another: based on the Cost Per Thousand (CPM) impressions charged by one buy versus another.
What Do We Want an Impression to Mean?
![What Do We Want an Impression to Mean?](/media/articles/image-cover-1707335338642.550x380_q85_box-0%2C83%2C550%2C463_crop.png.webp)