This tutorial guides developers through building a simple bot on Glitch that can provide random facts about numbers using the Nexmo Messages API and NumbersAPI. The bot is built using Hapi.js, a Node.js framework, and utilizes a virtual phone number to send and receive SMS messages. The bot's functionality includes receiving inbound SMS messages, processing the message content, and sending a response with a random fact from NumbersAPI if the content is a whole number. The code demonstrates how to integrate Nexmo's Messages API and Hapi.js into a Glitch project, allowing developers to build their own custom bots using these APIs.