Marketing The 5 most popular stories on PR Daily this week Social media and content marketing were top subjects on readers’ minds, with new FTC guidelines, Facebook changes and blog post tips making a splash. By PR Daily StaffJune 22, 2015 SHARE Ragan Insider Premium Content 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.