Definition:
✅ Impressions are when an advertisement or any other form of digital media renders on a user’s screen. Impressions are not action-based and are merely defined by a user potentially seeing the advertisement, making CPM campaigns ideal for businesses intent on spreading brand awareness.

Impressions In Digital Marketing:
✅ Digital marketing has made impression tracking significantly more quantitative than offline advertising. For example, a billboard owner has no concrete way of estimating the number of impressions his platform grants advertisers.

✅ Impression-based online campaigns, on the other hand, can measure impressions concretely and are generally sold in terms of cost-per-thousand (CPM) impressions.

✅ Impression tracking is a common metric for measuring the performance of most types of online marketing campaigns

CPM Definition:
✅ Cost per thousand impressions, or “CPM,” refers to the cost of displaying an advertisement one thousand times (known as “impressions”).

✅ The CPM pricing structure is used for some display ads and is an important metric for e-commerce businesses that maintain affiliate networks.