Site Hardening includes all the best industry standard security practices are used to:

•  Prevent the execution of PHP files in folders that get new files created like your cache or uploads, which are vulnerable to malware attacks.
•  Change the database prefix to help prevent SQL injections, when coupled with firewall protection.
•  Disable the Files-Editor so that they cannot make changes to any of your site’s files, just in case someone does access the backend of your website.

Please take a look at our guide on how to enable site hardening.