A report released today by Global Web Index (GWI) reveals that Tumblr is now the fastest growing social network, with its active user base having grown 120% in the past six months. At the bottom of the list? Facebook — although it’s still by far the largest. However, with over a billion monthly active users how much more room is there to grow? In overall new member signups, Pinterest led the charge with 57% growth, followed by Instagram, LinkedIn, Twitter, Youtube, and Google+ respectively. Facebook member base only grew by a paltry 6%, but again I direct you to my […]The post Tumblr Is Now The Fastest Growing Social Media Platform, Edging Out Instagram and Pinterest by @mattsouthern appeared first on Search Engine Journal.