This tutorial demonstrates how to implement a notification system for an on-demand laundry service using Java and Twilio. The system sends SMS notifications to customers when their orders are picked up or arriving, providing real-time updates on the status of their laundry delivery. The implementation involves creating two servlets: `OrderDeliverServlet` and `OrderPickupServlet`, which handle HTTP POST requests triggered by the delivery person. These servlets use the Twilio REST API Client to send SMS messages to customers' phone numbers, with optional media attachments. Additionally, the system provides a mechanism for handling message status updates from Twilio, allowing for real-time tracking of notification delivery and resending failed messages or sending automated surveys. The tutorial concludes by highlighting other Java Servlets tutorials that showcase the potential of integrating Java and Twilio for building scalable communication workflows.