The ability to communicate on social networking sites allows us to develop and build friendships and improve our social skills. However, communicating on such networks also entails security risks. For example, operators of large social networks face the possibility that the services offered can be misused, with some agencies collecting personal data from users and attempting to exploit it for advertising purposes. 6] 
Users of social networks share the same preferences and interests. They want to meet people, so in this communication they have to talk about themselves, what they are interested in in life, what they like and what they dislike. The danger is that some Internet users create false virtual identities in order to get acquainted with other social network users.
“What is the purpose of this?
Cyberbullying
This is one of those uncomfortable and dangerous topics that unfortunately has not left the Internet, the virtual world. It is cyberbullying. It is in social media that cyberbullying spontaneously escalated and eventually became known as cyberbullying. While cyberbullying is common in the general subconscious and usually occurs within schools, in virtual space it is easy to harass and even terrorize users of these networks, especially children and teenagers, at any time.
Can cyberbullying be defended against.19]
One possibility is that, thanks to reporting mechanisms on social networking sites, victims can immediately contact the site operators, who should respond immediately. Another piece of advice is to protect your privacy: every item you post on a social networking site has a sharing setting, or a range of people who can access the information you post. In any activity in the virtual world, it is really important and desirable to consider who should see this embedded information.