The 'Members' menu allows you to manage the members of a group. You can also view applications that prospective members have submitted and approve or deny such applications.

You can also create Teams in this section. Teams are simply groups of members within the group.This is useful in sending messages as the Messages and SMS creation pages feature a 'Teams' tab that you can use to send messages to a subset of group members.
Members can view other members in the group if the option is enabled for that group.

Member Application Form

You can configure custom questions that prospective members must answer when applying to join a group. Open the 'Settings'-'Application Form' menu option in order to do this. You can add Text, Textarea, Select, Radio and Checkbox Fields.
This interface is only available when a user is logged into a group.