The growth of social networks is extremely rapid. In just ten years, Facebook has grown to more than `845` million users. According to statistics, Facebook accounts for the largest proportion among all of the social networks. Studies have revealed that using Facebook can help adolescents feel more connected with their friends and increase their sense of belonging to a community as well as enhance their self-esteem, develop more positive perceptions about others, and gain more knowledge about the culture of their peers . At the same time, young adults find opportunities to seek social support and encouragement when they receive feedback from their peers. However, these positive effects are not found in all cases. Some people believe that they need to use social networks like Facebook or Twitter to maintain healthy relationships with peers but most of them ended up damaging their life by spending too much time on computers through these social networks.Additionally, we can learn about their culture by talking or chatting with them. Last but not least, several people earn money by using social networks to sell or advertise products. In fact, some people make sufficient amount of money as their living by marketing products in Facebook pages.
