Have you ever wondered what kind of users are active on the different social networks? Who’s using Facebook? Who’s active on Twitter? What does the population of Google+ look like? And how about Reddit, Digg, and Pinterest?
I know I have. Especially because I’ve noticed a long time ago that, although there certainly is some overlap between the different popular social networks, the populations as a whole aren’t quite the same.

But how to find out what the different social media demographics look like? Well, that’s where this terrific info graphic
For more info social media demographics