Value and outcomes
Retention
Also calledCustomer retention, User retention, Churn
The share of customers who keep using or paying for a product over time. Its opposite, churn, is the share who leave.
Retention is usually shown as a curve: of the people who started in a given month, how many are still active after one, three and twelve months. A curve that flattens out means the product has found people it keeps.
Because keeping a customer is usually cheaper than finding a new one, small gains in retention compound into large gains in revenue over time.