You can share a product from your store to the ff social sites : Facebook, Twitter, Google+ and Pinterest!
To use this feature, login to your store admin area, and scroll down to the 'Social' section. Here you can individually enable which social features will show up on your storefront.
Once a social network is enabled, your customers will be able to click on the icon on your storefront, to share your product.
To learn more, see our blog feature about this at Link hidden: Login to view
Let us know if there is anything else we can do to assist you. :)