In most cases, the MySQL Hostname should be set to 'localhost'. This is the most common configuration, in which both the MySQL server and the web server are running on the same machine.

In some cases, your MySQL database may be running on a different machine from your web server. If this is so, you must enter the hostname of the MySQL database server here.

If you are unsure of any of the MySQL configuration parameters, please consult your web hosting provider.