You'll learn how to quickly create a web app that allows you to export a list of your Twilio numbers, transfer them within your main account, and check the usage for each number and asset of your Twilio account using Twilio's Functions product. The app will be hosted on Twilio Functions' serverless computing platform, allowing you to host JavaScript code, HTML, CSS, and other assets without needing a personal server. You'll copy the provided code from GitHub and deploy it in the Twilio Console, then access the app by clicking on its URL. The app has customizable functionalities, security measures, and can be integrated with additional functions, but keep in mind that you should set strong passwords and only share them with trusted users to ensure security. Additionally, note that Twilio charges for Functions usage, with a free tier resetting monthly.