My first post.  Working with Google Analytics (GA).  What an incredible tool this is for those that are wanting to know about their site traffic.  GA allows the user to drill down to the screen size of any mobile sources that came in contact with his site.  The user is even able to know region demographics of visitors and the types of browsers and languages being used.  This is a great tool to help determine your target audience and what direction of growth one may be needing to take.