If a hacker is able to gain access to your site, he can place malicious code in your files that will grab your customers data, name, credit card number, etc., and have it emailed to him. There will be no way for you to know this has happened until it is too late. This contribution monitors the files and reports any changes to the shop owner. This should allow you to catch any such changes before damage can be done to your customers.
This package requires Cron to be installed on your server to work properly. Most hosts offer this option but some do not so please verify it is installed prior to ordering.