MySQL is a popular and widely used open-source database management system. It is a powerful tool that can be used to store and retrieve large amounts of data efficiently, and is commonly used in web applications to store and manage user data. MySQL is known for its speed and reliability, and is a popular choice for businesses of all sizes due to its low cost and ease of use. It can be used on a variety of platforms, including Windows, Linux, and Mac OS, and supports a wide range of programming languages. MySQL offers a range of advanced features such as backup and recovery tools, support for transaction processing, and strong security measures to protect data.