Grouping subscriber can help you manage newsletter in a better fashion. It can help you avoid sending the same email to customer twice.
Creating a group
1. Go to Customers
2. Click on Subscribers
3. Select MANAGE SUBSCRIBER GROUPS
4. Click on Create New Group
5. Type in Group Name
6. Select subscribers on the left box
7. Click on >> to add selected subscribers into the group
8. Repeat step 6-7 as many subscribers as you want to add
9. Click on Save
Note : You can use checkbox under the left box to filter subscribers
Adding subscriber into the group
1. Select Edit from drop down list
2. Select subscribers on the left box
3. Click on >>
4. Repeat steps as many subscribers as you want to add
5. Click on Save
Removing subscriber from the group
1. Select Edit from drop down list
2. Select subscribers on the right box
3. Click on <<
4. Repeat steps as many subscribers as you want to add
5. Click on Save