There is social media and there is social network. We have to differentiate them to understand them
Both are technology used to bring people and information closer. The difference between them is the way they are put to use — social networks are limited to connecting people together while social media is not just about the people. It is more than that, it is more wide and ambitious and all encompassing: the brands, the sports, the music, your interests, your friends’ interests, and advertisements for a thousand products vying for your attention and wallet.
Social media is not as personal as social networks. When social networks became too big they morphed to social media. Social networking just become part of it, and also ran. This idea occurred to me while reading this comment on why Facebook ceased to be interesting place once they started to bombard users with advertisements and hijacked the newsfeed: