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Social networks are the Internet programs that help friends, business partners or other persons to communicate and make connections with each other using a set of tools. These programs, known as "Online social networks" have become increasingly popular.
In fact a social network - a virtual association of people where they can share certain information The reasons for its existence are obvious: today people spend a lot of time on the computer and use it to share information with each other especially in electronic form, because it at least saves their time.
The main aim of the use of social networks youth see in communication with friends. Next are: the exchange of information, viewing photos, listening audio, video, "killing“ time, playing online games.
The main positive aspects of social networks: youth can communicate with friends at a distance, it is a fast and cheap way of communication, youth can easily make new acquaintances and so on. access to a lot of information, online education.
The main negatives: - psychological dependence, waste of time, damage to health, the replacement of real to virtual communication, - intellectual degradation and others. information may be incorrect or not authentic. - negative effects on family or personal communication.
Nowadays in the World Wide Web there are a lot social networking where any person is free to register and communicate with anyone.