A [Group] is a list of contacts which is mainly used for sending email and SMS campaign.
Personal Group The group is readable by owner only.
Public Group The group is readable by all other users of the same account.
Static Group It memorizes specific contacts when it is created/updated. Group contacts will not be changed unless through manual manipulation.
Dynamic Group It memorizes the selection criteria. Contacts are dynamically selected when it is being accessed. This dynamic changing nature gives the benefit of self group maintenance where any changes of contact (modification/addition/deletion) will result in automatically update of group(s).
Test Send Group Public Static Whenever you click on the [Test Send] button under [Create Email Campaign] or [Create SMS Campaign], test email / sms for preview purpose will be sent to this group. Maximum number of contacts is limited to 10.
Unsubscribe Group Public Static People who click and confirm the [Unsubscribe Me] link in the email footer will fall into this group and no more email / SMS will be sent to them.
Hard Bounce Group Public Static People who have invalid email address will fall into this group and no more email will be sent to them.