Oracle Database is an object-relational database management system (ORDBMS) developed by Oracle Corporation. It is used to store and manage data for large applications, web sites, and other distributed applications. Oracle Database is used to store, organize, and retrieve data in a secure and efficient manner. It is also used to create and manage databases for web applications, data warehouses, and other applications. For example, Oracle Database can be used to store customer information, product information, and financial data. It can also be used to create and manage databases for e-commerce websites, data warehouses, and other applications.