Twitter is a microblogging platform that allows users to post short messages called tweets that are up to 140 characters in length. It has over 255 million monthly active users, including 80% of world leaders. The majority of tweets come from mobile devices. While Twitter is most popular among 18-29 year olds, usage does not differ based on education, ethnicity, or urban/suburban location. To be effective on Twitter, users must communicate concisely within the 140 character limit by being brief, punchy, and to the point. Gaining followers requires posting engaging content regularly through tweets, mentions, retweets, hashtags, and profile customization while avoiding excessive self-promotion.