The recipients will receive a link to the note, which they can then use to collaborate on either an iPhone, iPad, or Mac running iOS 10 or macOS Sierra. You can send invitations individually or as a group. You can use Messages, Mail, social media, or supported third-party productivity apps.
It looks like the silhouette of a head with a plus sign (+) next to it. Once you've created a note, you can invite others to view and collaborate on it with you. How to invite people to make changes to notes in the Notes app on Mac
Note: Notes collaboration on the Mac is available on macOS Sierra and later. How to remove access to a note to individuals in the Notes app on Mac.How to stop sharing a note in the Notes app on Mac.How to work on a note in real-time with others in the Notes app on Mac.How to invite people to make changes to notes in the Notes app on Mac.So, you can share and work on Notes with anyone using any modern Apple device. macOS Sierra also includes the same, built-in, iCloud-based collaboration features as iPhone and iPad.