Added a ticket:
Discussion
Well in this case I meant getting a link to a note, and making sure that gets a nice preview if you share it on Twitter (or here).
There's already a share item, but that seems to try to open another app, rather than just give me a URL to paste. 
Share is here: 
Aha! I guess you make the URL configurable.
yeah could definitely. This is a deep link for damus users though which is handy. Could put alternatives on https://github.com/damus-io/notecrumbs if you land on the page outside damus
Oh damus share links have opengraph previews. Although they kind of suck. Need to improve. You can replace damus.io with njump.me to get a better preview 