Twitter is a social media platform that allows users to send and read short messages called tweets. Tweets are limited to 280 characters and can include text, photos, videos, and links to other websites. Twitter was launched in 2006 and has since become a widely used platform for sharing news, opinions, and personal thoughts. Users can follow other users and see their tweets in their timeline, they can also use hashtags (#) to join conversation or trending topics. Additionally, Twitter is widely used by journalists, celebrities, politicians, and businesses to share information and connect with their followers.