SNS refers to social networking sites that help people build Internet application services. It also refers to the existing mature and popular information carriers in society, such as short message service. Another common explanation of SNS: the full name of social networking site, namely "social networking site" or "social network". SNS also refers to social network software, which is the next generation of personal-based network basic software built by using distributed technology, or P2P(Peer to Peer) technology.