A module is a functionality which can be tested with Licence Protector. Even is your application is 'just one single application' it has at least one module. There a different module types and license information per module, which are explained in detail in the main Licence Protector documentation.
To identify a module, it has a module ID which appears on all reports.
Activation is done on module level. Even if only a Serial Number is used for activation (e.g. with EasyGo), a module ID is used.