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 an iPad or a Mac or Windows computer to share notes and manage sharing.
However, you can still edit shared notes and delete shared notes on iCloud.com on an iPhone.