New word--social media

Social media means people use the internet to create informations,and share,exchange,interact each others by this information contents.
 The most important and basical things about social media is the internet technology.And also,the most significant change of this media ,is that it transforming people from information accepters,content readers into publishers.Every single humanizing can be a media now.
  In US,Twitter,Blog,Facebook is the famous social media,and we also have weibo.com,renren in China.We can post anything on the social media and ask our friends to read. According to the data,people spend 73% time on the social media when they are on internet.