Mobile app notifications
From Carleton Moodle Docs
For students and teachers
The Moodle mobile app lets you keep up to date with all that's happening in your courses and on the site. Every time you open the app, events are synchronised with the main website.
You will receive Moodle calendar event notifications automatically. If you don't want to get them, you can turn them all off individually (or globally) in the Calendar events options in the main menu.
You will also receive notifications of messages, forum posts, submitted assignments etc (known as 'push notifications') if your site administrator has enabled these. To receive these notifications you need to enable them for your mobile on the app via Settings -> Notifications (only for Moodle 3.2 onward) or on the main site, from the user menu top right >Preferences>Messaging.