You can use ctrl+click to select multiple options for who will see the widget.
The admin user will always be able to see at minimum a place holder so he is able to get back in to change the widget settings.
If the Display Group is set to (group) Logged Out Users
then only normal users who are logged out will be able to see that section.
Any of the (group)
groups refers to user
level, while (quota)
refers to profiles where the user's home profile
is a member of that quota
This could be used to show adverts to logged out users, or show extra details to admin users, or any other use you can think of.