This document provides an overview of Twitter, including:
- Twitter is a social media platform that allows users to post short messages called tweets and follow other accounts
- Jack Dorsey founded Twitter in 2006
- The document defines common Twitter terms like timeline, tweet, retweet, mention, direct message, follower, following, hashtag, and trending
- It also explains privacy settings on Twitter like protecting tweets, blocking accounts, muting accounts, and reporting abusive behavior.