This tutorial guides you through building an app that allows users to send wishes to a Twilio phone number using SMS and voice calls, with the option for the special person(s) to listen to the wish by dialing the number. The app uses ASP.NET Core Web API and Entity Framework Core to save and retrieve messages from a database. The tutorial covers setting up the webhooks, configuring the Twilio console, and implementing the voice and SMS webhooks to play out random wishes to the caller.