Visibility settings help control who has access to groups and tutors. This can be done from the "Share" panel.
Private groups and tutors
When groups and tutors are set to private, only owners or invited members can access the group or tutor.
Unlisted groups and tutors
Setting groups and tutors to unlisted offers users the flexibility to share a link to the group or tutor without allowing the entire parent group (or workspace) to see it.
In the share panel, in addition to owners and invited members, "Anyone with the link" can join.
"Open to parent group" groups and tutors
The "Open to workspace" visibility setting allows a group or tutor to reach the widest audience.
In addition to owners, invited members, and anyone with the link, all members of the parent group can access the tutor or group.