The development of Information and Communication Technologies (ICT) leads people to live in a networked world. In this world, each individual opts for social networks that meet his needs ; These networks have become omnipresent in our daily life. The use of social networks social networks plays a great role in the reinforcement of sociability, especially of young individuals. The most active users on social networks are also those who have also those who have a fuller social life. The more users say about themselves, the more regularly they update their profile and the more "friends" they have. The communication and relationships between individuals and social groups are changed, the geographical distance between people gives way to a digital proximity. digital proximity. They offer themselves as tools with which individuals contact with ease, with each other through the screen. However, social networks offer many challenges such as the management of one's online of its online identity as well as its reputation...