Twitter is a social networking platform that allows users to post short messages called tweets. It gained popularity among athletes as a way to connect with fans by sharing news, scores, and other updates in a quick format. While critics question whether Twitter is good for sports, it benefits the industry by increasing fan engagement and involvement between athletes and fans. Famous athletes like Chad Ochocinco, Lance Armstrong, and LeBron James have large Twitter followings and help showcase how the platform can be used.