A shared database is a centralized repository of information that is accessible and editable by multiple users or systems. It allows for the storage and management of data in a collaborative and efficient manner, eliminating the need for individual databases and promoting data consistency and accuracy. This type of database is commonly used in businesses, organizations, and online platforms to facilitate real-time data sharing and collaboration among users. By providing a single source of truth, a shared database streamlines communication and decision-making processes, ultimately leading to improved productivity and streamlined operations.