A note is a simple eRoom page for composing, editing, and sharing information without using or requiring other members to have another application to do so (example).
When you create or edit a note, its properties are
the title of the note -- required
the text of the note
whether members can add comments and take votes on the note page -- initially on
whether members can add attachments to the note -- initially on
the access control properties for the note
what the note's icon looks like
whether the note has any custom commands (for details about custom commands, see the Server Extension Programmer's Guide within the eRoom API Help)
When you go to a note page, eRoom automatically scrolls to the first unread comment, if there is one.