"” Facebook has the ability to bring people together in a wide variety of relationships. A major factor contributing to the high usability of social media is that it connects people without any boundaries. Social media is basically a template for the user who can then personalize the source’s uses and productivity. It is a highly dense and vast resource that is being used on a consistent basis to maintain relationships."

http://www.elon.edu/docs/e-web/academics/communications/research/vol2no1/01Cabral.pdf