Notes are an additional tool for your workflow, e.g. to add a personal reminder to an entity. They are not part of the data model and won’t show in presentation sites or be archived.
Notes can be added at the notes tab when viewing an entity
Notes will be displayed at the entity view and at the Overview
Notes set to private (default) are only visible to you, public can be seen by everybody
Notes will get deleted if the entity is deleted by you or anybody else
Admins or manager can set notes of other users to private (e.g. in case they got inactive)