Explanation
Box 1: Private
Miscellaneous queues must be visible to everyone
The other queues must be visible only to the appropriate department.
In Customer Service, you can create two types of queues:
Private queues: Create with limited set of members to help those members easily view the queue items in that queue. Private queues streamline queue items for the members of that queue only and help to remove clutter from other user's views.
Public queues: Create to let everyone in the organization view the queue and all of its items.
Box 2: Public
Miscellaneous queues must be visible to everyone.
Reference:
https://docs.microsoft.com/en-us/dynamics365/customer-service/set-up-queues-manage-activities-cases