CPE

Additions, clarifications, extended definition

CPE is a performance metric for paid campaigns. It is calculated by dividing the total campaign cost by the number of recorded interactions. Interactions typically include reactions (likes), comments, shares, saves, clicks and other actions, depending on the platform and the chosen methodology.

Interpretation

This is a campaign efficiency performance metric that shows how much it costs to gain one engaged user. A low CPE means the campaign generates reactions cheaply and efficiently; a high CPE may signal, for example, low content appeal.

Watch out: limits and risks of distortion

• Methodologies differ in what counts as an interaction. It is essential to define this clearly and compare like with like.
• Track the sentiment of interactions as well – you can, for example, monitor positive-only CPE, i.e. the cost per positive reaction. This can be more telling than overall CPE.
• Short-term vs. long-term value – CPE measures only the cost of an immediate reaction, not the long-term benefit.

Where and how to measure

• Can be set up and tracked in the native analytics tools of advertising platforms (Meta Ads Manager, LinkedIn Campaign Manager, TikTok Ads Manager, etc.).