Typical structure

Basics

In general, social networking services allow users to create a profile for themselves, and can be broken down into two broad categories: internal social networking (ISN)^[28]; and external social networking (ESN)^[29] sites such as MySpace, Facebook, Twitter and Bebo. Both types can increase the feeling of community among people. An ISN is a closed/private community that consists of a group of people within a company, association, society, education provider and organization or even an "invite only" group created by a user in an ESN. An ESN is open/public and available to all web users to communicate and are designed to attract advertisers. ESN's can be smaller specialised communities (i.e. linked by a single common interest eg TheSocialGolfer, ACountryLife.Com, Great Cooks Community) or they can be large generic social networking sites (eg MySpace, Facebook etc).

However, whether specialised or generic there is commonality across the general approach of social networking sites. Users can upload a picture of themselves, create their 'profile' and can often be "friends" with other users. In most social networking services, both users must confirm that they are friends before they are linked. For example, if Alice lists Bob as a friend, then Bob would have to approve Alice's friend request before they are listed as friends. Some social networking sites have a "favorites" feature that does not need approval from the other user. Social networks usually have privacy controls that allows the user to choose who can view their profile or contact them, etc.

Some social networking sites are created for the benefits of others, such as parents social networking site "Gurgle". This website is for parents to talk about pregnancy, birth and bringing up children.

Several social networks in Asian markets such as India, China, Japan and Korea have reached not only a high usage but also a high level of profitability. Services such as QQ (China), Mixi (Japan), Cyworld (Korea) or the mobile-focused service Mobile Game Town by the company DeNA in Japan (which has over 10 million users) are all profitable, setting them apart from their western counterparts.^[30]

[edit]Additional features

Some social networks have additional features, such as the ability to create groups that share common interests or affiliations, upload or stream live videos, and hold discussions in forums. Geosocial networking co-opts internet mapping services to organize user participation around geographic features and their attributes.

There is also a trend for more interoperability between social networks led by technologies such as OpenID and OpenSocial.

Lately, mobile social networking has become popular. 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. Mobile phone users are basically open to every option that someone sitting on the computer has. Some companies provide wireless services which allow their customers to build their own mobile community and brand it, but one of the most popular wireless services for social networking in North America is Facebook Mobile. Other companies provide new innovative features which extend the social networking experience into the real world.

Another social networking feature in a professional aspect is Linkedin.com. This social network allows professionals to exchange information, opportunities, and ideas. Professionals are able to stay informed with new knowledge about their field.