Building a Bulk SMS Service with Python, Flask and Twilio Notify enables companies to send reliable and engaging bulk messages to their users. To follow this tutorial, you need a sufficient understanding of Python, Flask, and have the necessary dependencies installed, including Twilio Notify, which must be set up with an Account SID, Auth Token, and phone number. The service uses Flask to run a web server and sends SMS messages in bulk using the Twilio Notify API. The application includes utility functions for validating request bodies and sending API responses, as well as a demo client application built with React JS.