What are these buttons on posts and articles?
These buttons (shown at the bottom of this post) are “social networking” buttons. Each one represents a different service that allows you to share your interests with others.
The buttons are, from left to right: Facebook, Twitter, Linkedin, Google bookmarks, Delicious, Digg, Stumble Upon, Reddit, Gmail, Email program, Print with Print friendly, Google + and Pinterest. If you hover the mouse pointer over each button, you’ll see the name revealed.
To use each of these services, you must set up an account (for free). When you click on a service’s button for the first time, it will take you to the “Create an account / Login” page.