This metric breaks down the work hours of the user or team by focus time, meeting time, and fragmented time.
Fragmented time is defined as gaps of less that 120 minutes between meetings. Typically you want to minimize this so that developers can have uninterrupted time for deep work and minimize loss of productivity due to context switching.
This can serve as an excellent metric in promoting well-being in your teams.
It can help identify and pre-empt developer burnout