Retweeting is a phenomenon that has taken the Twitter world by storm.

The concept began when somebody added the letters RT to somebody elses tweet and posted it as their own. The idea caught on on a massive scale, and now there are services that utilize retweeting as the backdrop of their entire purposes. Some of Twitters best features are emergentpeople inventing simple but creative ways to share, discover, and communicate. One such convention is retweeting, says Twitter Cofounder Biz Stone.