The Breakout Room feature in Microsoft Teams has recently been rolled out. I’ve created the ~ 5 minute video below as a short introduction.
Breakout Rooms allow meeting participants to be divided into groups and added to separate “sub-meetings” that are linked to the main meeting. This allows members of each breakout to work together for a period of time before returning to the main meeting.
For reference, the Microsoft General Availability announcement can be found here.