zulip/help/include/user-groups-intro.md

User groups make it easier to manage any organization with multiple teams or job functions. You can:

• Assign permissions to user groups.
• Add a user group to another user group.
• Subscribe a user group to a channel. This individually subscribes all the users in the group.
• Mention a group of users, notifying everyone in the group as if they were personally mentioned.
• Compose a direct message to a user group. This automatically puts all the users in the group into the addressee field.

You may want to create a user group for each team in your organization.