This dialog allows you to assign a group number and/or premise ID to a group of animals. A group number is simply a number (1, 2, 3, etc) that you want to assign to a group. These are sometimes called string numbers. A premise ID is typically the official premise ID that is assigned to the physical location of this group by the pertinent government agency.
When you assign a premise ID to a group, the group's subgroups inherit that premise ID. You can override the premise ID that is inherited from a parent group by setting the group's own premise ID.