According to The Diffusion Group, 38% of U.S. adult broadband users currently participate in "social TV" activity at least a couple times per year. Social TV viewing is defined as the simultaneous use of mobile technology (i.e., smartphones or tablets) to communicate and interact with currently viewed TV content or with others regarding said content.Smartphones are the most popular device for social TV engagement, twice as popular as tablets (used by 87% and 42% of social TV users respectively). Only 13% of social TV users use both smartphones and tablets for these activities. Some 56% of social TV users are between the ages of 18 and 34.