The notification features can help you to automate communications with your customers using email and callout notifications. You can manage your notification rules for events in Zuora Billing, such as new invoices, payment expiration, and dunning notices. Email notifications are sent to your customers, and callout notifications send information to a specified web page or URL (via an HTTP/HTTPS call to an external web service).
To access notification settings, click your username at the upper right and click Billing > Setup Profiles, Notifications and Email Templates. For more information, see Notifications and Callouts.