With the development of science and technology, the number of Internet users is increasing rapidly, and in people’s daily lives, the Internet becomes more and more influential. Meanwhile, a variety of social media affects people lives. Social media are a new online media to allow users expansive scope for communicating. It has been following characteristics: first most social media services are available to join; they encourage people to discuss, write feedback and share information. Second the traditional media are a format of broadcast, and it is a one-way flow to transfer or distribute the content to users. However, the advantage of social media is two-way to broadcast information. Third in the social media, people can form a community extremely quickly, and they can communicate with a common interest effectively such as photography, drama, political and other topics. Finally, most of the social media are a powerful connectivity, through the link and integrate to merge multiple media together.
In the current media market, social media provide a useful platform to an advertising campaign, more and more advertiser prefers to provide advertising into Facebook and twitter page. About 500 million users use Facebook and Twitter users more than 120 million. According to Market research firm eMarketer prediction, this year's world social network advertising revenue will grow 14% to $2.5 billion. Social media advertising is the fastest growing network advertising.
Social media compared with the traditional media, the characteristics of social networks contains: firstly Active participation. The traditional media broadcast approach is one of the few for most, the carefully prepare content across to mass media, and social network is the participants themselves, people who interested in content through social networks platform release go out, and at his friend "circle" widely Shared. Secondly, No time limit. The content of the traditional media according to time, regional broadcast, watch is the limit on time and space. However, social networks are not subject to any limit on time and space. People can control time and space.