The Facebook Power User
Sunday, February 5, 2012 at 06:50PM 
Photo by StephVee
They dominate your news feed with likes, shares, and photo tags. They are Facebook's Power Users, and unlike Typical Users, they give more than they receive.
The Typical User
A study by the Pew Research Center’s Internet & American Life Project observed Facebook activity over a one-month period and found outbound-likes outweigh inbound-likes 4 to 5. In other words, for every 14 "likes" a user bestowed upon their friends' content, the user's content got "liked" 20 times.
The Power User
The reason for this discrepancy? Power Users make up the difference. True to the Pareto Principle, this group is largely responsible for the photo tagging, messaging, and "liking", while comprising only about 20-30% of the Facebook population.
Power Users also tend to specialize. “One group of power users dominates friending activity. Another dominates Liking activity. And yet another dominates photo tagging.” says Keith Hampton, the study’s lead author.