Hello, you can use the developper mode in bottom of general setting screen of settings app.

When you activate developper mode you can select the group menu in settings apps -> user and company -> groups.

Then, filter on "technical" groups and clic on groups you want ton discover. 

1. User in groups
2. Inherited groups implies (and access granted with this)
3. Menus you can see with this group
4. Views you can access and see
5. Access right
6. Access record rules

All you need to now for this group !