CNN International

A new CNN study focused on news, advertising and social sharing finds that 27 percent of all sharers contribute 87 percent of the news stories that are shared. On average, active users share 13 stories a week and receive twice that from their social networks.

The study was specifically focused on the impact social sharing had on brands that advertised on news sites:

"The global online survey showed that people who received news content from a friend or associate via social media, were 19 percent more likely to recommend the brand that advertised around that story to others and 27 percent more likely to favor that brand themselves."