Need to keep up with social media usage? Ypulse tracks social media trends in our monthly surveys, and we found that Vine, Instagram, and Snapchat have seen steady growth since November 2013. Finishing out 2014, 16% of Millennials were on Vine, 50% on Instagram, and 40% on Snapchat. Our Silver and Gold subscribers can find helpful visuals that detail our tracked trends in the Data Room on Ypulse.com. (Ypulse)