PR 12 PR and marketing pros to follow on Twitter Get more out of your social media stream by following these communications experts. By Beki Winchel@bekiwekiJan. 7, 2015 SHARE To read the full story, log in. Become a Ragan Insider member to read this article and all other archived content. Sign up today Already a member? Log in here. Learn more about Ragan Insider.