MySQL is a popular open-source relational database management system (RDBMS) used for storing and managing structured data. It is widely used in web applications and services, as well as in standalone applications and embedded systems. MySQL uses a client-server architecture, in which client applications communicate with the MySQL server to perform various database operations, such as querying, inserting, updating, and deleting data. MySQL supports standard SQL (Structured Query Language), which is a powerful and widely used language for working with relational databases. It also provides a wide range of additional features, such as stored procedures, triggers, and views, that make it easier to implement complex database functionality. MySQL is known for its speed, reliability, and scalability, and is compatible with a variety of operating systems and programming languages. With its ease of use, performance, and flexibility, MySQL has become one of the most popular databases for a wide range of applications.