The article describes how to set up and use a turnkey application on the Twilio Runtime platform to send SMS campaigns from a CSV file without writing any code. The application is deployed on the serverless platform, which eliminates the need for hosting infrastructure. To follow this tutorial, users need Node.js, Git, a free Twilio account, and Twilio CLI with Serverless Toolkit installed. They can deploy the code by cloning the GitHub repository, setting up environment variables, and deploying it to their Twilio account. The application allows users to upload a CSV file containing phone numbers and variable fields, authenticate using credentials, and select columns for the message body. Users can then validate phone numbers, add media content, manage opt-out URLs, and monitor delivery status. The application also supports WhatsApp campaigns with predefined templates and read receipts.