Puro’s social sharing related settings.

Post Sharing
Show icons to share your posts on Facebook, Twitter, Google+ and LinkedIn.
Page Sharing
Show icons to share your pages on Facebook, Twitter, Google+ and LinkedIn.
Twitter Handle
This handle will be recommended after a user shares one of your posts.
If you’re using Puro Free and would like to review the premium offer, navigate to Appearance > Puro Premium from within WordPress.