I have not seen this before. Not sure if a test or a release. Google is getting downright social in their old age.
And in typical Googly fashion THEY decide which sharing I should be able to use rather than relying on the iPhone OS level options. Oops just seemed to have forgotten SMS/iMessage. Big surprise there.
Google Adds Sharing Link to Local Knowledge Panel
by Mike Blumenthal
It seems that Google just can’t resist falling into this sort of passive aggressive monopolist mode. It must be what is best for the user.