Database table prefix

During the installation process, you can change the default wp_ prefix to
anything you want. In fact, most security experts recommend that you
change the database prefix because WordPress is a big target for hacking
(malicious scripts, spam, and so on). Web bots and spiders can be set to
look for the usual WordPress default settings and attempt to exploit them.
The wp_ database table prefix is one of those obvious default settings, so
to safeguard your installation, change the prefix to anything you choose.
However, keep in mind that if you change the prefix, you need to change it
to something very difficult for a script or an automated program to guess.
Treat the prefix like a password and make it a random string of letters and
numbers — something like sd30df43xxi54_. Just be sure that it’s unique
and difficult to guess.

If you didn’t change the table prefix during installation, you can go back and
do it later if you want to. You will need to edit the $table_prefix line in
the wp-config.php file. Also, you’ll need to alter the table names in your
database by accessing the database administration interface provided by
your Web hosting provider (like phpMyAdmin, for example) and by renam-
ing the tables to replace the wp_ prefix with the one you defined in the
wp-config.php.