NoSQL, or “not only SQL,” refers to a category of database management systems that diverge from traditional relational database models. Designed to handle large volumes of data, NoSQL databases offer flexible data storage options, such as key-value pairs, documents, wide columns, and graphs. They are particularly suited for applications requiring scalability, high performance, and the ability to manage semi-structured or unstructured data. As the demand for big data and real-time analytics grows, NoSQL technologies have emerged as essential tools in modern data management, complementing traditional SQL databases rather than replacing them.