One common complaint I hear from marketers is that social media is not (yet) a mass medium. For example, the circulation for Cosmopolitan is 3 million, while the magazine counts just 700,000 fans in Facebook. And while it seems (almost) everyone is creating, using or consuming social media today, it is a highly fractured channel. Thirty years ago, almost every person watching television was tuned into one of three networks; today, 550 million people use Facebook, and each and every one of them is their own network.
However, the fact that social media is fractured and personalized does not mean that it isn't a mass medium; it just means it is a challenging mass medium. Here is the evidence for social as a mass medium: