This article describes how to turn Sharing "On" in Yahoo! Social Bar.

To turn automatic sharing on, select On from the "Social" drop-down menu under "You on Yahoo!." Once you have gone through the initial Yahoo! Social Bar permissions flow, sharing is turned "On" by default.

To receive a pop-up reminder whenever you are about to share an article or video, make sure the Remind me when I share checkbox is filled. 

Once you opt-in to sharing, we will start sharing articles and videos you view on Yahoo! site with your Yahoo! and Facebook friends. Links to these articles will appear in your friends' Facebook newsfeeds, and your friends on Yahoo! will be able to view your reading and watching activity through the "You on Yahoo!" module.