This book has won the CHOICE Outstanding Academic Title award 2014. Since its launch in 2006, Twitter has evolved from a niche service to a mass phenomenon, it has become instrumental for everyday communication as well as for political debates, crisis communication, marketing, and cultural participation. But the basic idea behind it has stayed the same: users may post short messages (tweets) of up to 140 characters and follow the updates posted by other users. Drawing on the experience of leading international Twitter researchers from a variety of disciplines and contexts, this is the first book to document the various notions and concepts of Twitter communication, providing a detailed and comprehensive overview of current research into the uses of Twitter. It also presents methods for analysing Twitter data and outlines their practical application in different research contexts.