Summary  
This chapter introduces the document-oriented NoSQL database model, where data is stored in flexible, JSON-like documents grouped into collections rather than fixed tables.  

General domain of usage  
Backend application data persistence


MongoDB is a database used to store data for backend applications.

Instead of storing data in tables like traditional databases, MongoDB stores data in documents.

A document is a structure that looks like a JavaScript object:

```javascript
{
  name: 'John',
  age: 25
}
```

Documents are grouped into collections. A collection is similar to a table, but it stores flexible data instead of fixed columns.

For example:

* Collection: users;
* Document: `{ name: 'John', age: 25 }`.

MongoDB uses a JSON-like format, which makes it easy to work with in JavaScript applications.

This makes it a natural choice when building backends with Node.js and Express.


Learn how to store and manage data in backend applications using MongoDB and Mongoose. Connect your Express API to a database and perform create, read, update, and delete operations. Build real data-driven backend functionality and move beyond in-memory storage.

What Is MongoDB?