when you put your site on your host like hostmonster,
your must specify your database location and user name & password.
how should these be filled ?
suppose your mysql database name called db_drupal,
your database password is db_user,
your database password is db_pass,
then those should be:
database name: db_duser
database pass:db_pass
database location:localhost
the drupal system will generate a config string which saved in the sites/all/default/settings.php
like:
$db_url = 'mysql://db_duser:db_pass@localhost/db_drupal';