Abstract
This paper aims to present the concept of online social networks (OSN) and its evolution in the world of business as well as several
important advantages and disadvantages of using online social networking sites. We are presenting a quantitative research on the
main reasons for using online networking sites by high schools students from the several counties of Romania. The authors will
present the results of the research which underline: the main activities undertaken by students with this new communication tool,
the average number of friends the students have and the selection criteria for them as well as the influence level of OSN sites on
the life and activity (school and private) of the students.