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This paper has made attempt to study the activities and reasons for using Social Networking Sites by the Post Graduate students and research scholars of Maharishi Dayanand University, Rohtak, India. A self structured questionnaire was distributed among the target population and primary data gathered through questionnaire were analysed and discussed in accordance with the objectives of the study. It was found that majority of the respondents to be aware and making use of such applications in their research work. The study also reveals that Facebook is the most popular SNSs among the all categories of students and research scholars.