A social network may be a social system  made up of people or organizations referred to as  nodes, that are connected by one or additional specific kind of reciprocity, like friendly relationship,  common interest, and exchange of finance,  relationships of beliefs, information or status. A  cyber threat will be each unintentional and  intentional, targeted or non- targeted, and it will 
come back from a spread of sources, as well as  foreign nations engaged in undercover work and  knowledge warfare, criminals, hackers, virus writers,  discontent staff and contractors operating inside a  company. Social networking sites don't seem to be  solely speaking or act with people globally, however  conjointly one effective means for business  promotion. In this paper, Tendency to investigate and  study the cyber threats in social networking websites.  the aim of this paper is to review and analyze these  threats of social network and develop measures to  shield the identity in cyberspace i.e., security of non public data and identity in social networks are  studied.