Document-oriented databases are a type of NoSQL database designed to store, retrieve, and manage semi-structured data as documents. Instead of relying on rigid schemas like traditional relational databases, they use a flexible structure where each document is self-contained and can have varying fields. These databases are especially useful for applications where data structures evolve over time.

In this lesson, we will explore how document-oriented databases work, their key features, popular systems, and real-world use cases.