Cloning your site is just another level in fix hacked wordpress that may be very useful. Cloning simply means that you've backed up your website to a completely different place, (offline, as in a folder, in order to not have SEO problems) where you can get it at a moment's notice if the need arises.
Is also important. You want to backup all the files and database so in case of a sudden attack, you can bring your own site back like nothing.
It represents a essential task while it's an odd term : creating a WordPress backup of your website to work on offline, or in the event something should go amiss. We are not simply being obsessive-compulsive here: servers go down every day, despite their claims of 99.9% uptime, and if you've had this happen to you, you know the panic is it can cause.
Along with adding a secret key to your wp-config.php file, also consider altering your user password into something that's strong and unique. A great idea is to avoid common phrases, use upper and lowercase letters, and include numbers, although you will be told the strength of your password by wordPress. It's also a good idea to change your password regularly - say once.
Oh . And dig this incidentally, I talked about plugins. Make sure it's a safe one, when you get a new plugin. Don't install any plugin because the owner is saying that plugin will help you do this or that. Use get a software engineer to analyze it, or perhaps a test blog to their website check the plugin. This way isn't a threat for your business or you.