This tutorial introduces Mongoose, a popular Object-Document Mapper (ODM) for MongoDB, to a Node.js and Restify API. It guides developers through the steps needed to modify their API by integrating Mongoose, which provides a straightforward schema-based solution for modeling application data on top of MongoDB's native drivers. The tutorial covers the basics of Mongoose schemas and models, route creation, and entry point setup. By following this tutorial, developers can simplify writing MongoDB functionality as a layer on top of their API and gain experience with using an ODM like Mongoose.