NoOp is the short form of No Operation and is a simple command that does not anything to the results list, but can assist as a blind helper for some operations, since it understands advanced file parameters.
NoOp:[advanced file parameters],<any number of optional parameters here>
The first example checks the environment variable greeting whether it is set to HelloWorld, and if so, lets the scanner skip the following 10 lines during On-Demand scans. The second example operates similarly, but tests only for the existance of said environment variable.
None, this is a blind thing.