Research Paper (postgraduate) from the year 2012 in the subject Social Studies (General), grade: B, , language: English, abstract: Human being living in the globe is craving for their self-satisfaction by accomplishing several aims, like money, social status and also successful achievements. Behaviors can reflect ones subjective feelings, and their reactions are certainly a scale to tell whether a person is self-centered or not. Many specialists before do researches and some findings are found. Factors affecting subjective well beings of human life are main point to focus for our research. Moreover, the social media nowadays is influential to human lives, people especially youngsters rely on social media as one of their identities' representations. It is likely that within few decades pass and ongoing, technology will then undergo evolution and become more advance. People who use social media are not merely for networking but also to publish themselves to their friends or the public. Therefore, we will look into the functions and importance of online social media in Hong Kong. The research will also focus on the types of popular social media in Hong Kong and thus attracting what types of people to fancy of them. Since Facebook is the most commonly use social networking sites, therefore we will have a deepen study of Facebook. Besides, our research will also have a study on the history and news about using Facebook and disclosing personal information with the advantages and disadvantages. As the technologies development is rapidly growing, now people can connect to the Internet with tiny electronic devices - cell phones. With Internet assessable cell phones on hands, we can download tons of mobile applications, like games, online newspaper and the most important ones, the social media applications, including Facebook, Twitter, Weibo, Whatsapp, LINE, Tango and so on. No doubts, the convenience and fast access speed of technology are changing our perceptions and the - from Amzon