A "Retweet" is a feature on the social media platform Twitter that allows users to share someone else's tweet with their own followers. When a user retweets, the original tweet is reposted on their profile, maintaining the original author's content and attribution. This helps spread information quickly and allows users to share interesting or relevant content they find. Retweeting can also include a comment, known as a "quote tweet," where the user adds their own thoughts or context. This feature encourages engagement and conversation among users, making it easier to share opinions and connect with others on various topics.