Note Reasons are categories (or reasons) designating the purpose of the note. The advisor selects a student, enters a note (or comment) for that student, and then selects a Reason for the note. Some possible examples of Note Reasons might be: ROTC Plan, Honors Academic Plan, etc.
The new reason will now be available for selection.
Note: It is probably a good idea to work with the institution's advisors to come up with a good Note Reason list.