Abstract
By way of introduction, we can say that in recent years, we have noticed a sharp increase and improvement of the web tools. In passing the web 1.0, most of the websites were commercial in nature or communicative about the web 2.0 which allows users to enrich the content of websites according to their desires or feelings. That's why users move from a position of consumers to a position of full players on the web platform. In having much more involved visitors in this virtual life than in the past, we can observe the arrival of a community center grouped by interests and ideas, these are what we call 'social networks'.
The first thing that needs to be said is that Social networks are communities of individuals or organizations in direct or indirect relations, collected according to the center of common interest, such as musical tastes, hobbies or professional life.
What should be established at the very outset is that nowadays, many Internet websites are the source of creations of such networks, they allow the user to register and create a sort of virtual identity card, most often called 'profile'. The network is called 'social' because it lets you exchange with other members on the same network, for example: public and private messages, hyperlinks, videos, pictures and games. The fundamental ingredient for a good social network is the ability to add 'friends' and manage their contact list.
According to a study conducted by comeScore in July 2009, Russia was in the first position for the number of hours spent on social networks with 6 hours a week per person. France was located in the 16th position with 3 hours per week, personally I spend between 5 and 7 hours per week on Facebook.
