Although somewhat difficult to understand unless you grasp the subsequent tutorial, first let's share some basic information about this service.
This service provides a CNS contract
This is the CNS address where GMO is the service provider.
For CNS, see the ContractNameService chapter.
It is used to register data that requires access control.
Reference: setData: register data with ACL
The modules for using this service within the end user environment.
Are a group of contracts to use when implementing contract functionality.