Groups

A Group is a specific subset of classes for a given discipline. Some examples are grouping by age, belt, or interest such as combat, weapeons, competition preparing, or a team only group. The main purpose of groups is to be able to offer some organizing and separation on the calendar

Schedules

The class schedule is defined at the group level. This means, in simple terms, if you want to create/update/modify your class schedule, it happens at the group level.