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

Groups provide an easy way to refer to multiple users at once. You can:

• 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.
• Subscribe a user group to a channel. This individually subscribes all the users in the group.