What is a retention triangle?.

Retention triangle is an analytical model used to analyze user retention in a product.

It is represented as a triangle, where each side reflects key retention metrics:

• User activity (e.g., DAU — daily active users)
• Usage frequency (how often a user returns)
• Session duration (time spent in the product)

By analyzing these three parameters together, one can understand how effectively the product retains users, identify bottlenecks and growth points for improving user experience and increasing loyalty.