What are groups
Groups are ways of collecting user accounts together so they can be assigned to things like a learning site in the Learn app, accessing peers’ Portfolio app, and for sending messages to in Messages and Broadcast apps.
You can create multiple groups, and have one user be a member of multiple groups. For example you might create a class group (e.g. Year 1) and assign all the students to that class, and then create a music club group which can contain members who are also in the Year 1 group.