NoSQL databases are gaining popularity due to their ability to handle large amounts of unstructured data and provide high performance, scalability, and flexible schemas. They offer several advantages over traditional SQL databases, including horizontal scaling, fast read and write operations, cost-effectiveness, and ease of updates. NoSQL is well-suited for modern applications such as social media, chat, IoT, and gaming, where complex relationships and real-time data processing are crucial. It can handle massive datasets, manage unstructured or semi-structured data, enable agile development practices, demand high-performance workloads, model complex relationships, and monitor data in real time. NoSQL databases provide a more flexible and scalable alternative to traditional SQL databases, making them an attractive option for many use cases.