The assignment content highlights the importance of NoSQL databases in handling big data, which is characterized by velocity, volume, and variety. The traditional relational database management systems (RDBMS) are no longer suitable for meeting the demands of big data due to their rigidity and fixed schema requirements. NoSQL databases offer a flexible solution that can accommodate semi-structured and unstructured data efficiently. They are driven by cloud computing, big data, and web technologies, making them an alternative to traditional SQL databases. The importance of NoSQL databases is demonstrated through examples of their deployment in organizations such as e-commerce companies, which require scalable solutions to handle sudden spikes in user activity.