Twitter is a social networking web application that provides users with the ability to share information instantly.

Twitter users post status updates, news, events and other information. Posts are limited to 140 characters and can be sent from and received via text messaging in addition to traditional desktop applications. The brief, "micro-blog" format and ease of mobile posting allows users to post and follow up-to-the-minute news.

Business professionals use Twitter as a way to network and communicate with contacts. Many companies are using Twitter as a marketing or public relations channel.  You can post corporate accomplishments and distribute links that take people back to your company's website, press releases, and other promotional sites.

Twitter is outfitted, like most social media tools with the ability to subscribe, share, friend or follow as many Twitter feeds as you like.