Cost Per Engagement

What is (CPE) cost per engagement?

Cost per engagement, or CPE, is a pricing model used in mobile user acquisition campaigns in which app advertisers choose a post-install event and only pay for users who engage in that specific event. In cost per engagement advertising, the event can be defined in a number of ways, such as: reaching level X, writing a review, completing registration, etc. CPE = advertising cost / engagements