In the Photos app you can hide photos both on the Mac and on iOS. Hidden photos will disappear from Photos view, albums and other views, but they will appear in a special Hidden album. This feature is not meant to be a secure way to protect photos, but just a tool to hide photos before deleting them or to take off photos out of normal viewing methods when they don't belong there.
Excellent Gary, I've always been curious about "Hidden photos" & now that I understand it, I'll be able to put it to very good use. Thank you
So happy to learn this tip. I’ve always wished there was a way to hide photos. i will use it all the time.