This tutorial demonstrates how to set up a webhook that sends an SMS message using the Nexmo Messages API and the Node.js framework Hapi, when a Typeform is submitted. To complete this tutorial, you need to create accounts with Vonage, install the necessary dependencies, and configure the application with the Nexmo Messages API. The code uses the hapi server to receive incoming webhooks from Typeform and sends an SMS message using the Nexmo Node JS Client Library. The process involves setting up a new Messages & Dispatch application via the Nexmo Dashboard, creating a skeleton application with a POST route, initializing the Nexmo instance with your API key and secret, and updating the route handler to send an SMS message. Once you've completed these steps, you can connect the webhook to Typeform and test it by clicking the "Test Webhook" button, which will receive an SMS message with the details.