Share notes on iCloud.com
You can invite people to view and edit a note. When you share a note, only people you invite can view and edit it, even if someone else has a link to the note.
When you share a note, the shared icon appears next to the note in the notes list.
If you use the Notes app on an iPhone, iPad, iPod touch or Mac, you can also share folders. See the Apple Support article Share your notes on your iPhone, iPad, iPod touch or Mac.