MongoDB is a NoSQL, document-oriented database designed for handling large amounts of unstructured or semi-structured data. Instead of using traditional relational databases that store data in tables and rows (like MySQL or PostgreSQL), MongoDB stores data in JSON-like documents with flexible schemas. This makes it easier to work with changing or unpredictable data structures.
MongoDB is often used for applications that require flexibility in data modeling, scalability, and high availability, such as web applications, real-time analytics, and content management systems.