The amount of social activity surrounding prime-time TV has nearly tripled year over year, said Mark Ghuneim, CEO of social TV tracking service Trendrr.tv. We spoke with him earlier this week at the Ad Age Social TV conference about Trendrr.TV's latest findings in social TV. "It's explosive and happening naturally with consumers," he says in this video interview of the 194% growth in social buzz for TV shows year over year. "Social TV is the heart of smart TV."Trendrr.tv's customers include studios, networks, brands, producers, and agencies who use the real-time tracking data to understand consumer sentiment around shows, ads and news. Clients are even using it to understand which characters in a show are resonating, he says. Trendrr.tv tracks social feeds from Twitter, GetGlue, Facebook, Viggle and other second screen services to produce reports around the impressions and the engagement with TV across social channels.