Oprah Winfrey has already conquered daytime television, built a media empire and interviewed some of the world’s most recognizable figures. Now, at 72, she is taking on another medium: podcasting. And her reason for doing it is remarkably straightforward. “One of the things I know for sure is I know how to talk,” Winfrey said in a recent interview with LinkedIn Editor in Chief Dan Roth, according to Entertainment Weekly. The comment was delivered with the humor that has long been part of Winfrey’s public persona. But behind the joke is a career-long understanding of what makes a conversation meaningful. …