You can manage existing groups from the Groups page in the Organization Settings.
1. To find a group, you can conduct a search by the name of the group or group admin(s).
2. Click on any heading in the table to sort the group list.
3. Click on the group name to highlight, then:
a. Click "Delete" to delete the group.
4. Click on the pencil icon next to a group name to edit the group, manage group members, etc.