Twitter Twitter is a website, owned and operated by Twitter Inc., which offers a social networking and microblogging service which enables its users to send and read other users' messages called tweets. Tweets are text-based posts of up to 140 characters displayed on the user's profile page. Tweets are publicly visible by default, however senders can restrict message delivery to their friends list. Users may subscribe to other author tweets—this is known as following and subscribers are known as followers. As of late 2009, users can follow lists of authors instead of just following individual authors. Air Hogs is tweets.