Facebook was first introduced (in 2004) as a Harvard social networking site, expanding to other universities and eventually, anyone.
Web-based social networking services make it possible to connect people who share interests and activities across political, economic, and geographic borders.
Companies are using social media as a way to learn about potential employees’ personalities and behavior. In numerous situations a candidate who might otherwise have been hired has been rejected due to offensive or otherwise unseemly photos or comments posted to social networks or appearing on a newsfeed.
Social networks are providing a different way for individuals to communicate digitally.
50% of British employers banned the use of social networking sites/services during office hours.
A profile is generated from answers to questions, such as age, location, interests, etc. To protect user privacy, social networks typically have controls that allow users to choose who can view their profile, contact them, add them to their list of contacts, and so on.
In most mobile communities, mobile phone users can now create their own profiles, make friends, participate in chat rooms, create chat rooms, hold private conversations, share photos and videos, and share blogs by using their mobile phone.