What is this tool?
The minify option compacts your code ready for production, this does not add any extra security but may be handy.
The rotate option randomly spins strings in your code making it much harder to reverse-engineer.
Domain locking is optional and only allows the code to be run on a list of domains that you have specified. They should be formatted like this:
example.com, subdomain.example.com, anothersite.com