A developer is learning backend web development via the 'Chai Aur Code' YouTube series, focusing on the 'Chai Aur Backend' track. The initial lessons cover connecting frontend and backend, specifically addressing CORS errors and implementing solutions without npm packages. This foundational step establishes the necessary communication channel for full-stack development.

The core lesson shifts to data modeling, treating it as a blueprint for saving data in a MongoDB database. The tutorial employs Mongoose as the ODM (Object Data Modeling) tool, emphasizing the new keyword when instantiating a `mongoose.Schema`. Key considerations include setting field types like String for names and usernames, with the latter requiring uniqueness based on application use cases.

Creating a model involves `mongoose.model()`, which accepts the model name and the defined schema. A critical MongoDB behavior is that it pluralizes the model name (e.g., 'User' becomes 'users'). The boilerplate code includes `timestamps: true` to auto-generate `createdAt` and `updatedAt` fields, streamlining versioning. The developer now focuses on structuring data models and populating fields.