Social Media 10 things brand managers should know about social media Learn the six different networks within Twitter, Pinterest’s best days, and what breeds the most engagement on Facebook in this infographic from Mainstreethost. By Kevin J. AllenAug. 19, 2014 SHARE Ragan Insider Premium Content Did you know Fridays are funny on Pinterest? Or that brands have one hour to respond to someone on Twitter? Or that Twitter has six distinct communication networks? Social media is evolving so rapidly that it can be tough to keep up. 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.