Like rivals Facebook and Twitter, LinkedIn is no longer just a social network, it's a content platform, a recruiting tool, a resume builder and much, much more. In the Red Chair this week, CEO Jeff Weiner explains how the company has grown and evolved. Plus, Walt Mossberg talks about apps for work and Ina Fried dives into the business of wearables.Learn more about your ad choices. Visit podcastchoices.com/adchoices