Twitter Inc.

Twitter is a social media site that allows users to connect with each other in 140 characters or less. Those who sign up can follow others, including celebrities, who are identified with blue check marks, see their tweets, and interact with them. Since being created in 2006, the San Francisco-based company has grown in popularity, and in 2015, the site was used by 500 million people worldwide. Twitter is one of the most influential sites in the world, and as such, users have the opportunity to interact with each other during major live events.