What is Social Network?
A Social Network is a website, or network of websites, specifically established to allow end users to communicate directly with each other on topics of mutual interest
Greenfield voiced concern that fast-paced social networking habits could change the shape of young people’s developing brains, while Sigman speculated that online social networking, in lieu of face-to-face contact, could lead to poor health.
But genuine, published scientific studies haven't yet validated those claims.
In fact, current research indicates that tweeting, status updating and other social networking activities might actually be good for our psychological well-being, physical health and in-person relationships.
“We’ve found that the more people are engaged with Facebook by any measure, including number of friends, hours on the site or volume of sharing, the better they feel,” said Moira Burke, a researcher at the Human-Computer Institute at Carnegie Mellon University.
Those positive feelings are direct products of social capital, or the informational and emotional support family, friends and acquaintances provide. Extensive research has established that the more social capital people believe they have, the greater sense of well-being they enjoy.
“Our brains haven’t changed, our real world social networks haven’t changed for the most part,” Fowler said. “So the question is how we’ll fit these new technologies in to our real world social networks.”