This command will provide online help for NickServ. You may use it without any parameters to get a list of topics you can get help on. If you wish to receive help on a specific command use the command name in the help syntax.
/msg nickserv help
/msg nickserv help set
/msg nickserv help set protect
This is the easiest way to look up what a command does or exactly how to use it. You will probably find yourself referencing the help files often if you want to do anything at all complicated on a chat network or spend a lot of time helping or teaching others.