The median session duration in seconds per device during the specified period.
Median session duration per device is defined by the number that divides a sorted ascending list of median sessions durations of each device in half (excluding broken sessions).
The session is a time interval during which the user has not interrupted interaction with the application. For mobile apps, the session starts with the launch and stops when the application has spent more than 30 seconds in the background. For web apps, the session starts with page view and stops when more than 30 minutes have passed since the last view.
Median unique session dur., sec. – Flow metric
Median unique session dur., sec. CA – Current Attribution metric
Median unique session dur., sec. LT – LifeTime metric
Median unique session dur., sec. AT – Attribution Time metric