There a variety of types of notifications the app generates: Announcements, which are generated by the system administrators; Event Alerts - Daily, which are sent daily at 8 AM for any events on the calendars of the building(s) to which you subscribe; Event Alerts - Weekly, which are sent weekly at 5 PM on Sundays for any events scheduled on the calendars of the building(s) to which you subscribe; (School) news, which are sent when new news items are posted for the building(s) to which you subscribe.
ADDITIONALLY, you will need to enroll in any notifications for your child's courses, which will be listed. You will see the course name and section number. This corresponds to information on your child's schedule in Sapphire.