That's the advantage: social share button if any of the visitors will be able to account for his various social. Visitor to all those friends will see it, then it will be all the friends in your posts, it will increase traffic to your website.
I'll add all button:
3. Google Plus
5. Stumble it
6. Digg this!
This work it finishes only 30 minutes
Note: Message me before your Order Take Place.