Mentioning a user in a channel message will instantly send them a notification, which may vary depending on their personal notification preferences.
What is a "Mention"
A mention is a great way to draw a specific person or a group of people's attention to your message. They will be immediately notified of your mention.
How to mention a user in the channel:
Select a channel you wish to mention a user in
Select the message bar to compose a message
Type @ into the message bar and select:
"Notify All in This Room" or "@all"
"Notify Active Users in This Room" or "@here"
or type in a specific user's name you wish to notify following the "@"
After you've typed "@user", compose the rest of your message as you normally would
Press send and they will be instantly notified!
Note: Using the "@all" function will send a notification (email) to everyone in the room. This is a great way to send important reminders to your students or group members. It essentially acts as a list=serv.