Lightning Experience allows you to protect sensitive data with Private Notes.
When you create a note from a record, the sharing defaults to 'Visibility Set by Record.' You can keep Notes on records private by following these steps to check the 'Prevent note from being viewed by other users with access to this record' box.
To ensure related Note is set as Private
Note: The new option will relate the Note to records but will prevent others from seeing it, keeping it private. Users with View All Data permissions can also access the Note.
Common Behaviors of a Private Note
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