In the blog post, "Real-Time SMS with Erlang, ChicagoBoss and Twilio", the author creates a web application using Erlang and the Chicago Boss framework that displays incoming SMS messages in real-time and allows users to respond to them. The application uses functional programming, which is ideal for concurrency and high-volume traffic applications. The author sets up a development environment, installs Erlang and the Chicago Boss framework, and creates a basic "Hello, World" application. They then expand the application to receive and display incoming SMS messages in real-time, allowing users to respond to them using the Twilio API. The application also includes features such as storing Twilio authentication credentials securely, starting new Erlang services for making HTTP requests, creating a Twilio module, and adding a new controller action and view. The author provides a comprehensive guide on how to create this real-time SMS application using Erlang and Chicago Boss.