About Twitter

Twitter is a free social networking and micro-blogging service that enables its users to send and read other users' updates known as tweets. Tweets are text-based posts of up to 140 characters in length, which are displayed on the user's profile page and delivered to other users who have subscribed to them (known as followers). Senders can restrict delivery to those in their circle of friends or, by default allow anybody to access them. Users can send and receive tweets via the Twitter website, Short Message Service (SMS) or using applications. The service is free to use over the Internet, but using SMS may incur phone service provider fees.

Source: http://en.wikipedia.org/wiki/Twitter

Twitter can be configured to send text messages from specific users directly to your cell phone. See the Twitter help website (English only) for details on setting up your cell phone to interact with Twitter, and how to receive tweets from specific users directly on your phone.

To learn more about Twitter, see the CommonCraft videos on Twitter Basics and Twitter Search.