While the Moodle data directory stores files uploaded by students and some larger files, the Moodle database stores most of the information in your Moodle site. By default, the installer uses the database name moodle and the username moodleuser. Using these default settings gives any hacker a head start on breaking your site. When creating your database, change these to something less common. At least make the hackers guess the name of your database and the database username.
You should also choose a strong password for the Moodle database user. The following are some recommendations for strong passwords:
Include at least one number, one symbol, one uppercase letter, and one lowercase letter
Make the password at least 12 characters long
Avoid repetition, dictionary words, letter or number sequences, and anything based on biographical information about yourself
You will need to create the Moodle database and the database user before you...