Our Reward Points extension allows you to place social buttons on Product and Categories pages, and even more - using Behaviour Rules you can make your customers earn points for sharing your products in social networks.
You can configure, which buttons shall be shown at Stores > Settings > Configuration > Mirasvit Extensions > Social Networks Settings:
How to Create Facebook Application.
Business and Pages
AddThis is a special network service, which allows to place on your store almost any social network button. However, these buttons are not tracked by our rules, so they can be used only for promotional purpose.
Important Note: An useful tutorial for creating AddThis buttons can be found here;