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.
While you can view shared notes on iCloud.com on an iPhone, you must go to iCloud.com on a tablet or a computer to share notes and manage sharing.
However, you can still edit shared notes and delete shared notes on iCloud.com on an iPhone.