This tutorial demonstrates how to use Twilio's Programmable SMS service in a PHP and Laravel application to send instant lead alerts for real estate agents. It starts by creating a landing page with a form that collects user contact details, which are then sent to the agent's phone number via an authenticated Twilio REST API client when a new lead is received. The tutorial also covers how to handle HTTP POST requests from the form, format messages with lead information, and send SMS messages using Twilio's REST Client.