In Tutoom you can send mass announcements to all the group rooms created in the session.

First make sure you have them created, learn how to create rooms.

To send an announcement follow these steps:

Go to Rooms in the navigation bar.

Click on Announce to all groups.

Write your message and customize it with emojis.

Click on Announce or Enter to send it.

Your announcements will reach all Rooms in their chat panel.
All participants will see the message.