Social media has become one of the major channels that people utilize to connect with others and the rest of the world. This study used a large scaled survey to gather data from people that are using social media to investigate the benefits and concerns that end users have with regard to using social media. The results show that the most signification benefits survey participants perceive of using social media is to improve communication with other people. At the same time, most of people also believe social media is a good marketing tool and can help collaborate with others. As to concerns of using social media at work / school, many participants agree that there are additional barriers to using social media at work / school, relating to the extra security, privacy and legal concerns.