What is the main advantage of using NoSQL databases over traditional relational databases?

NoSQL databases offer schema flexibility, allowing developers to store and manage unstructured or semi-structured data without predefined schemas. This flexibility is advantageous in scenarios where the data model is evolving or where dealing with highly variable data types. Unlike traditional relational databases that enforce a strict schema, NoSQL databases can adapt to changing data requirements, making them more scalable and agile in certain use cases.