These are some Frequently Asked Questions about this service, with some answers.
What is TWITTER?
TWITTER is a micro-blogging service. You can use it to write short notices about yourself, where you are, and what you're doing, and those notices will be sent to all your friends and fans.
How is TWITTER different from Twitter, Jaiku, Pownce, Plurk, others?
TWITTER is an Open Network Service. Our main goal is to provide a fair and transparent service that preserves users' autonomy.
The software also implements the OpenMicroBlogging protocol, meaning that you can have friends on other microblogging services that can receive your notices.