There are a couple of notifications guardians can receive through Playground. These notifications can be selected from the Settings tab of the Admin Dashboard.
Activity notifications: Parents will get notifications on each activity recorded onto the Feed.
Parent statement email: Primary guardians will receive an email of their statement with current charges.
Overdue reminders: Primary guardians will receive an email reminding them to pay an overdue balance.
Either of the above emails can be edited under the Emails tab by clicking "Edit email".