Can you explain what the term 'non-relational database' means?

A NoSQL database is a type of database that does not use the traditional relational model with tables and relationships between them. Instead, data can be stored as documents, key-value pairs, graphs, or columns.

Main features:

• Flexible data structure that does not require a strict schema.
• Well-suited for large volumes of data and distributed systems.
• Often provides high speed for read and write operations.

Example: MongoDB stores data in JSON-like documents, which is convenient for dynamically changing data.