From the Groups page you are able to view the listing of Groups as well as Edit and Delete Groups
To Edit a Group
1. Select the Group name from the listing
2. Select the 
icon
3. The complete the form to update a group page will display
4. Make you necessary edits and Save the changes
To Delete a Group
1. Select the Group name from the listing
2. Using the 
icon select to delete the Group
3. The Delete Group confirmation screen will display
4. Select Yes
5. The Group will be deleted
NOTE: When you delete a group you are also deleting the history associated with that group. Be sure that you are following any organization specific retention policies.