Social sharing buttons for sharing a quiz URL would be a huge asset for the Quiz Add-on.
The way I envisage them is that the share buttons would appear at the end of the quiz, e.g. in a confirmation message, and would share the quiz URL. It would also be great to have the option for users to share their quiz score, too.
I've tried adding my own to the Confirmation Message on the current version of the Quiz Add-on, without success, and I would love that feature to be included.