You can create a group by selecting contacts and then groups. Next, simply click add.
Test group vs. definitive
When you create a new group, you have the option between test and definitive. You can use a test group to send test emails to. It is impossible to send a test email to a definitive group or system group.
System groups
In the Webpower platform, system groups are groups that are created automatically when a new campaign is created. These groups cannot be deleted. They include groups like subscribers, unsubscribers, hard bounce and soft bounce.