MySQL is a database program often required by web applications like WordPress or Drupal. (See our explanation of the difference between MySQL and MariaDB.)
Typically, you will need to create both a MySQL database and a username (and password) with access to your database.
Always create the database first. You can do that by clicking the "MySQL Database" link in the left sidebar, then clicking the "New Item" button in the top right.
You only need to fill in the unique name you would like to give your database ("sampler" in the image above). You can leave the remaining fields set to their default values.
Once you have a database, you will want to click the "MySQL database user" link in the left sidebar to add a user with access to your database.
On this screen, enter a unique database username. You can create your own password, but we recommend clicking the link to generate a random one and then copying and pasting the value that is displayed to a safe spot.
Next, click the checkbox next to the database you want to grant access to and select "Full" as the type of access.
You can leave "Max Connections" set to the default 25.
If you are installing a web application that requires a database, the values you will be expected to provide are: