This command is used to make and organize character notes, which the staff look at when it comes to your leveling
+cnotelist - Gives you a list of all cnotes on your character object.
+cnoteview <notename> - Shows you the contents of the named cnote.
+cnote <notename>=text - Sets &cnote<notename> on the player to the value of the text with person and time added.
To add +cnotes to yourself manually using '&<attributename> me=<text>'... don't. +cnotes are used by the advancement system (specifically, the +Advapply command) and are added to your advancment application based on the timestamp on the +cnote. So setting them manually tends to leave big gaping blank spots in your advancement apps.