MySQL is a very fast and robust database management system.
A database allows you to store, search, sort and retrieve your data efficiently.
The MySQL server controls access to your data to ensure that as many users as possible
work simultaneously with them.

So, MySQL is a multi-user server (multiple users) and multi-threaded server (multiple threads).
It uses SQL (Structured Query Language), the standard language for querying databases worldwide.
MySQL has been publicly available since 1996, but its development history begins in 1979. It has won the Linux Journal Readers' Choice Award several times.
MySQL is available under an Open Source license, but commercial licenses are also available if needed.