Now that we have Mongoose set up, we can start building our schema. The schema defines the structure of the documents in our database. In this lesson, we'll create a schema for a simple e-commerce application that includes products, reviews, and images. ## How to determine the schema Before diving into the code, it's essential to take a step back and analyze the requirements of our application. Let's break down the ideas and figure out how to structure our schema. You can follow 3 steps to help you write the schema: