What types of data and information are usually stored in a MongoDB database?

MongoDB typically stores documents in BSON format, which extends JSON and supports additional data types. The main data types and information stored in MongoDB:

• Strings
• Numbers (int, long, double)
• Boolean values
• Dates
• Arrays
• Embedded documents
• ObjectId objects (unique identifiers)
• Null values
• Binary data

MongoDB is often used for storing heterogeneous data, such as:

• User profiles with different structures
• Logs and events
• Product catalogs with dynamic attributes
• Sessions and cache

Example of a document in MongoDB:

{
  "_id": ObjectId("507f1f77bcf86cd799439011"),
  "name": "Ivan",
  "age": 30,
  "emails": ["ivan@example.com", "ivan.work@example.com"],
  "address": {
    "city": "Moscow",
    "zip": "101000"
  },
  "isActive": true
}

Thus, MongoDB flexibly stores structured and semi-structured data.