For those who aren't yet "users", Twitter is micro-blogging. Up to 140 characters only. You can employ it to feed news, to comment live on events (you can submit 'tweets' from a mobile as well as a computer), to update people on what you are doing, for news alerts, etc. People click to 'follow' you - to get your tweets either on screen or on the mobile or both. You can also 'follow' others to get their updates.
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