Page History
...
Number of Inactive Users
This number indicates the amount of known users who have not accessed your site during the selected time frame.
Average Number of Visits Per User
This number shows the average amount of visit sessions each user engaged in during the selected time frame.
Average Length of Visit (Minutes)
This number displays the average amount of time in minutes a user spent navigating your site during each visit session.
Average Depth of Visit
This number indicates the average amount of pages clicked through during each visit session by user during the selected time frame.
Active and Inactive Users
...