Social networks are online communities which are made up of individuals who are connected to each other in some way. This could be through friendships, interests, dislikes, relationships and so on. Social networks have been around since the late 1990s and there are hundreds of these networks in existence, with the majority of them being free to join and participate in.
Probably the most well known of all these social networks is Facebook with over 750,000,000 members. Social networking is used to convey thoughts and messages to people who are in your network and today many businesses will use social networking to advertise and gain more customers.