JDBC (Java Database Connectivity) is an important technology for developers to know. It provides a standard API for accessing any type of relational database. With JDBC, developers can write applications that can access data from different databases with the same code. This makes it easier to maintain and deploy applications on different systems. In addition, JDBC offers features such as query optimization, advanced security, and support for distributed transactions. It's an invaluable tool for developers who need to access multiple databases in a variety of ways.