This tutorial demonstrates how to use F# and ASP.NET Core Minimal APIs to respond to SMS and voice webhooks from Twilio. The process begins by setting up a new ASP.NET Core project with F# and adding the necessary Twilio libraries. The code is then written to implement the SMS and voice webhook, allowing for dynamic responses based on incoming messages or calls. To secure the webhooks, the ValidateTwilioRequestFilter is used to validate requests originating from Twilio, ensuring that malicious actors cannot access the application. Finally, the application is configured to use user-secrets to securely store the authentication token, and the next steps are outlined for further learning and building with Twilio.