I'm reading a lot about DAU/MAU being a good metric for user engagement. But what is a DAU and what is a MAU?
For Daily Active Users: Is a user not a Daily Active User if they missed one day in the past 30 days?
For Monthly Active Users: Is a user a Monthly Active User if they were present once in the past 30 days?
Should I even be measuring by the past 30 days or should I go by calendar months?