The article provides a step-by-step guide on how to build an Interactive Voice Response (IVR) system using Twilio's Programmable Voice tools, Java, and Maven. The process involves setting up the project directory, adding dependencies, creating an IVR class, building out the IVR menu system, allowing the caller to respond to the IVR system, and configuring the Twilio service. The application is then compiled and run, with the possibility of using ngrok for public exposure. Once set up, the IVR system can be tested by dialing a phone number, and it serves as a starting point for more complex applications.