1. Navigate to your group and click in Google Groups. 
2. Click on the gear icon to enter the “Group settings.”Expand /settings icon.
   
3. On the context menu, click Group Settings.
4.  Expand the Members menu item and then click on the left side of the screen. Click on the link to Invite members.
5. Enter the email addresses for the people you want to add to the group. Separate email addresses with commas. Each person will receive an invitation to your group and must accept before they can receive messages. Invitations expire in one week.
6. Enter a message to the invitees. The group's name, description, and address will automatically be included in the email.
7. Click the Send invites button.
   An email will been sent to the invitees with a link to access the group.

This method allows you users to add members to the group without sending them an email invitation.

1. Navigate to your group and click in Google Groups. 
2. Click on the gear icon to enter the “Group settings.” Click Members > /settings icon.
   
3. On the context menu, click Group Settings
4. Expand the Members menu item on the left side of the screen. Click on the link to Direct add members.
5. Enter the email addresses for the people you would like to add to the group. Please see these instructions if you wish to add a member from outside our domain.
   Please note that adding people from outside the  Beloit.edu  domain requires a welcome message be sent.

6. Choose the email subscription option you prefer.
   

7. Click the Add button located at the top of the screen.
   The new members will now be directly added to your group.

This method allows others to request to join your group. Each request will need to be approved or rejected by the group owner or manager.

1. Navigate to your group
and click
2. in Google Groups. 
3. Click on the gear
icon to enter the “Group settings.”Click Permissions >
4. /settings icon.
   
5. On the context menu, click Group Settings
6. Expand the Permissions menu item on the left side of the screen.
7. Click on Basic permissions.
8. Choose who may request to join your group. By default this is limited to
our domain, but if
9. the Beloit.edu domain. If you want the group to be public you may check the box to
“Allow
10. , Allow members external to this
organization.”
11. organization 
12. If you do so, it is recommended that you write a “new member question.” The question will appear on the group's sign-up page. Submitted answers can be used to determine if a person fits membership criteria.
13. Click on the Save button.

Now others will be able to request for group membership.