The study analyzed over 7 billion instances of social sharing activity from 300 million users across the top 1,000 websites in March 2011. It found that Facebook accounted for 56% of all shared content and 38% of clicks on shared content, while Twitter generated 11% of shared content and the highest click through rate. Although sharing content widely is less common than initial sharing between connected individuals, sharing represents a major source of web traffic and referral traffic to websites from search engines and social media. The researchers hope to help brands leverage understanding of sharing behavior to better enable sharing and integrate it into user experiences.