notifybutton

noun
UK /ˈnəʊtɪfaɪ ˌbʌtən/
US /ˈnoʊtɪfaɪ ˌbʌtən/

A button you press to tell someone something.

Press the notify button to let your teacher know you are done.


OTHER MEANINGS

2. A clickable control in an app that sends an alert to other users.

Tap the notify button so the group knows the game has started.

3. A physical button on a device that triggers a message or alarm.

The notify button on the doorbell lights up when someone arrives.

4. A feature that sends a reminder about an upcoming event.

Set the notify button for ten minutes before the meeting.