This document provides an introduction to key Twitter concepts and features including hashtags (#) which are used to mark keywords or topics in tweets, the @ sign which is used to call out usernames, and direct messages (DMs) which allow for private messaging between users. It also briefly discusses #FF (Follow Friday) hashtags for sharing accounts to follow, retweets for sharing another user's tweet, and a quote about what makes Twitter powerful from an Internet expert. It concludes by introducing the author Lara Abdulhadi and her social media experience and strategy background.