A short quote from the original post:
“Social media is people having conversations and interactions,” underlined Oliver in his presentation, clarifying that it’s not about a group of individuals broadcasting as a company, which would not mean ‘social’ anymore. “It’s about people having conversations, people having to listen, and not only to speak. Communication has changed.”
The key feature of social media is the possibility to broadcast media. Fifty years ago, as Oliver stated, you could meet with people, talk with them, write to them, have a conversation, travel to visit them – and that was all. At that time, only TV and radio stations, and publishing houses, could broadcast. Today every individual can broadcast.
hellriegel.net, Social Media Marketing and Branding, Oct 2009