That is not how it (is supposed to) work(s). Maybe some better copy-edit is needed here but essentially it allows:
- anyone to keep a note on a profile – only accessible by the user themselves [see here], hence the word “private”
- staff can decide to share the note they are writing with other staff members
- with the latest version you can configure in the settings that the feature may only be activated in the admin-interface
The basic idea was to leave notes for yourself to look up on a profile. To allow you to have a context. For example a user could write down “Met them at conference X in 2014”.
I am welcoming PRs for better wording…