Meaningful use, not maximum screen time
For a design tool, engagement might include active editing and collaboration. For a tax-filing product, a short successful session once a year may be ideal. This is why an active-user metric needs a product-specific definition. Session length by itself cannot distinguish absorbed use from confusion.
Teams might look at return visits, use of key features, completed tasks, and collaboration.
Define healthy engagement
More activity is not always good. Repeated visits may mean users are getting value, or that they cannot finish a task. Notifications can increase app opens without helping anyone. Teams choose measures tied to users’ goals, compare different user groups, and talk to people to understand the numbers.