Social Media Study: Facebook accounts for 38 percent of all sharing referral traffic Email and Twitter lag behind the social network, but links shared via Twitter will probably generate more clicks on average than Facebook, the study said. By Kevin Allen@kevin_j_allenJune 7, 2011 SHARE An estimated 10 percent of all traffic online is dedicated to sharing. A new study puts this sharing phenomenon into perspective. ShareThis worked with Starcom MediaVest Group and Rubinson Partners to get to heart of where and what people are sharing on the Web. The big winner? 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.