Google Analytics with social media channels

https://developers.google.com/analytics/devguides/collection/gajs/gaTrackingSocial

This document describes how to use Google Analytics to get interaction metrics on non-Google networks such as Facebook and Twitter. Use this document to set up Analytics for your social sharing buttons if you are a site owner, a content management plug-in developer, or if you are a social network operator wanting to provide automatic social interaction reporting for users of your sharing buttons.