This document provides an overview of Twitter, including its origins and growth, how to use it to share thoughts, follow trends and news, follow interesting people, and get customer service. It notes that Twitter launched in 2006 and became popular at SXSWi in 2007. Key uses of Twitter outlined are sharing thoughts in 140 characters or less, including photos or videos, mentioning other users with @, and making words searchable using hashtags. The document also cautions that news on Twitter can sometimes be wrong or accounts hijacked.