Marketing The 5 most popular stories on PR Daily this week This week’s PR Daily readers were interested in ways to increase Instagram engagement, AP style tips for cocktail titles, a history of the Oxford comma debate and more. By PR Daily StaffMarch 13, 2017 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.