User groups in shared calendars allows to make Label Groups and add users into it, in shared calendar. Using it you can filter the calendar events based on groups.
When you open shared calendar it shows all the events of the CRM users and teams, sometimes it get too complicated as the whole calendar is filled up
Go to shared Calendar
Predefined groups are created as per clients requirement. In this example, 9 different groups are created with name lbl_group1, lbl_group2, lbl_group3 up to lbl_group9
Here is a screenshot showing all the
How to add a user or a user group to shared calendar filter by groups
Click on the edit button next to the user/group
An edit window will open