Twitter is a free social networking and micro-blogging service that enable users to send and read messages known as tweets. Tweets are text-based posts displayed on peoples profile page and delivered to the author's suscribers who are known as followers. Senders can restrict delivery to those in their cricle of friends or allow open access. Users can send and receive tweets via the Twitter website, SMS or external applications.
Twitter began in a 'saylong brainstorming session' that was held by board members of the podcasting company Odeo in an attempt to break out of a creative slump. At that meeting Jack Donsey introduced the idea of an inidvidual using an SMS serivce to communicate with a small group.
It allows people to post opinions online with status updates to friends and the public whilst at the same time allowing all to comment on them.
The main users of Twitter are mostly generation Y however some older people, as well as celebrities have Twitter profiles.
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