No, it's not. Don't worry about it.
While processing an application, CIC employees mark the progress on a file in their system - what was done, when it was done, who did it. FOSS notes are a print out of those notes so the applicant can see what's been done with their file. Same for CAIPS notes, only that's for outland applications.
Most people never need to deal with this, you only order them if your application has been taking too long or you think it's not being processed properly.