This tutorial demonstrates how to integrate voice biometrics using Twilio Serverless and VoiceIt to authenticate callers accurately with just a few lines of code. The solution is built by cloning the repository, setting up Airtable to store caller data, registering for a VoiceIt account, deploying the code to Twilio Serverless, connecting a phone number, and testing the experience. The tutorial showcases the potential of biometrics technology in various industries, such as financial services, healthcare, and humanitarian assistance, highlighting its benefits and limitations.