What is Twitter

Twitter is a social networking and microblogging service that allows you answer the question, "What are you doing?" by sending short text messages 140 characters in length, called "tweets", to your friends, or "followers."The short format of the tweet is a defining characteristic of the service, allowing informal collaboration and quick information sharing that provides relief from rising email and IM fatigue. Twittering is also a less gated method of communication: you can share information with people that you wouldn't normally exchange email or IM messages with, opening up your circle of contacts to an ever-growing community of like-minded people.