Nowadays, it is explicit that maximum people are relying on social media not only to gain information but also for communication (interacting with known and unknown people). For some people it is a platform to form a new identity and gain social acceptance and for others it is an opportunity to approval of self-image specifically in young adults. Social media have direct impact on people self (beliefs, confidence, and esteem) and behavior. In this metanalysis study, many different published studies have been complied and results of each study have been elaborately defined. It is observed that social media is like a coin with two different sides, it has its pro and con. A person who used it responsibly to gain information, social media worked as a pillar in their life from where they can gain knowledge anytime, they want but they have careful about fake and information. In this case social media directly influence behavior of a person day to day. In other aspect, when person used social media to form an identity to gain social acceptance his/herself (beliefs, confidence, and esteem) was directly influenced and behavior was impacted indirectly. This study clearly states the positive and negative aspects of social media in young people life.