According to Kittinger

According to Kittinger, Correia, & Irons (2012) that, The way human beings interact has rapidly changed over the last decade due to online social networking sites such as Facebook. These Web-based systems allow members to connect with other members electronically, while also allowing them to make these connections and interactions publicly. The most popular social networking site is Facebook. Launched in 2004 at Harvard, Facebook originally was designed for university students, but now is accessible to anyone with an email address. Between 2007 and 2008, time spent on social networking sites increased eighteen percent, with Facebook users reporting a 566-percent increase in time spent on the site.