Alex Iskold explains what microblogging is, and how it differs from blogging and social networks:
“Despite the fact that content creation in social networks is very easy, it has a very different purpose and very different feel from blogging. In social networks the informational bits are scattered, but in blogs, they are focused and organized sequentially. Social network publishing is very terse, blog publishing is verbose. Is there a form of publishing which is on one hand as easy as social networking, but as sequential as regular blogs? Twitter and Tumblr have recently emerged to define this new category of microblogging.”