The click on "Copy" button in order to get the full URL. Paste the URL to any of the platform (email/hangout, etc,.) you want to share with. Your recipients will then able to open the BookMark selections you had saved earlier. Do take note, when you had "Unpublish" your BookMark, all your recipients will no longer able to open this BookMark unless they have created a copy of the BookMark themselves. It is advisable to highlight this point to your recipients when you are sharing a BookMark.