What do we mean when we say social media?

The Dayton Business Journal recently published the list of the top ten most visited social media websites. The list was compiled based on total number of visits.¬† No big surprise with Facebook, YouTube and Twitter in the top three spots. ¬†Interesting to me was that Pintrest ranked fourth and that two relatively new sites, MeetMe and Tagged, scored pretty high up there, bumping Yelp at the same time.¬† Nothing much legal about a list of sites, but I think it interesting to have a sense of just what we are speaking of when we say “social media.”