https://support.zoom.us/hc/en-us/articles/206476313-Managing-Video-Breakout-Rooms

Overview

Breakout rooms allow you to split your Zoom meeting with up to 50 separate sessions. The meeting host can choose to split the participants of the meeting into these separate sessions automatically or manually and can switch between sessions at any time.

• Up to 50 breakout rooms can be created
• Max 200 participants in a breakout room (requires Large Meeting 200 add-on)
• Breakout room participants have full audio, video and screen share capabilities

You can also share Participating in Breakout Rooms with your meeting participants for some information on using breakout rooms as a participant.

Notes:

• See Getting Started with Breakout Rooms for information on how to enable breakout rooms for your account.
• You can also pre-assign participants to breakout rooms when you schedule the meeting instead of managing them during the meeting.
• It is suggested that you enable Participant Register for your Zoom session to be able to pre-assign participants to breakout rooms.
• [Important] Having your participants Register for your Zoom session makes it easier for Zoom to place students into their pre-assigned breakout rooms using their email address.