Social television is a general term for technology that supports communication and social interaction in either the context of watching television, or related to TV content. — Wikipedia
Social TV is a new phenomenon that allows viewers to engage with a second screen, be it a computer, tablet or mobile device, while viewing standard television. This buzz topic, which has been on the radar of marketers for a while, has now exploded into a major player in increasing a brands online capital. Just when advertisers were losing the battle to their nemesis, the DVR, Social TV came to their rescue, encouraging real-time tune in and engagement with fans.