CPM — Cost Per Mille (Thousand Impressions)

Definition

The cost of showing an ad one thousand times.

Formula

CPM = Ad cost / (Impressions / 1,000)

Worked Example

$4,000 spend, 800,000 impressions:

CPM = $4,000 / 800 = $5.00

Interpretation & Pitfalls

CPM measures media price, not effectiveness — cheap impressions to the wrong audience are expensive.

In TupicFinance

Campaign records store spend and impression data for per-channel CPM.