Active User is the indicator of product health by calculating the total number of users using or interacting in a particular period. Time interval and interaction are two important components to measure active users. Though active users sound straightforward, there are few ways to calculate them;  ADAU (Average daily active users): It is the average of the users in 30-days  User return: Helps the product team calculate how much the product attracts users and compels them to come back.  WAU (Weekley Active User): It helps to measure the performance of the products that work dominantly during weekdays, like analytics, forums, etc.