Cost Per Impression (CPI) is the amount of money spent to get 1,000 views or impressions of an advertisement.
A more commonly used term is Cost Per Thousand Impressions (CPM), which is the cost of 1,000 impressions. The term CPM comes from the Latin word "mille," meaning thousand.
CPM is a critical metric for advertisers to understand the cost of reaching their audience on different platforms and through various ad formats. While it does not measure engagement or conversions directly, it provides a clear view of the cost involved in generating visibility for an advertisement:
Cost Per Impression (CPI), often referred to as Cost Per Thousand Impressions (CPM), is a common metric used in digital marketing and advertising to measure the cost of 1,000 impressions of an advertisement. An impression occurs each time an ad is displayed to a user, regardless of whether the user interacts with it. This metric helps advertisers understand the cost of reaching their target audience and is crucial for budgeting and evaluating the efficiency of ad campaigns.
CPM = Total Cost of Campaign / Total Impressions × 1,000
Suppose you spend $2,000 on a digital advertising campaign and achieve 500,000 impressions. The CPM would be calculated as follows:
CPM = 2000 / 500,000 × 1,000= $4
This means it costs $4 for every 1,000 impressions your ad receives.