How do customer notifications work for field service appointments?

Customer appointment notifications keep customers informed about their upcoming service visits. Methods:

1. Email Notifications — triggered automatically via Flow or Process Builder when a Service Appointment is scheduled, rescheduled, or the technician is en route.
2. SMS Notifications — sent via Salesforce Flow using an SMS action (requires an integrated messaging provider).
3. Automated Notification Flows — a Record-Triggered Flow fires on Service Appointment status changes (e.g., "Dispatched," "En Route," "Completed") to send the appropriate message. Notifications can include appointment window details, technician name, and a tracking link. Customer consent records should be verified before sending SMS notifications.