What Is Twitter?

Answer:

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."

Currently we have email, instant messenger, and VoIP tools like Skype as one-to-one or one-to-few online communication tools. For one-to-many online communication, online publishers can turn to blogs to create and distribute content rapidly and reach anyone on the web through RSS feeds.

Twitter is a combination of these various forms of communication.

In short…Twitter is micro-blogging. It is social messaging. It is an event coordinator, a business tool, a news reporting service and a marketing utility.