Shows the number of visits that a user had from his first contact up to a certain point of time.
Example
A user had his fist visit on February 13 and performed three visits overall:

An analysis for the whole time period (Feb 13 to Feb 15) yields the following result:

Example for using this dimension in a filter
- Show only the second visit of users:

Similar Dimensions
URM - Customer Profile Visits: Counts the lifetime visits of a single user up to his last visit.
Training document Extended user-centric analyses