Once you're logged in to the parent app, you're able to update which notifications you would like to receive. If your school has set up parent/guardian notifications, you can receive an email if your student(s) are added or removed from a group.
Go into your settings (by clicking the menu icon in the upper left corner of the header) click Settings and toggle the switch next to the group you want to receive or turn off notifications for.
For example, "Dress Code" would send you an alert once your student receives a dress code violation, "Absent Today" would send you an alert once your student's daily attendance code was set to "Absent", or "Detention Warning - Almost 4!" would alert you that your student is about to receive a detention. The groups you see will depend on the groups your school has set up.