Why we tweet: Part 2

12:00 AM ET Thu, 8 Aug 2013

Carl Quintanilla, host of CNBC's "#TwitterRevolution," discusses the state of social media with Matthew Knell, vice president, social and community, About.com; Melissa Rosenthal Brenner, senior vice president of marketing at the NBA; Heidi Moore, editor, U.S. finance and economics, The Guardian; and Christina Warren, senior tech analyst, Mashable.