The internet has revolutionised the way we live our lives in untold ways, but the most far-reaching is the impact it is having on the way we communicate. Social media sites in particular allow us to maintain friendships beyond geographical barriers, to build up and exploit networked contacts, and to cultivate a public image. And how we communicate online has a profound and lasting impact on language and society. This very timely book brings together a broad selection of the exciting and diverse research that is currently being conducted into language on social media sites including Facebook, Twitter, and TripAdvisor. Studies from leading language researchers, and those at the cutting edge of analysis into social media, explore the impact of social media on how we relate to each other, the communities we live in, and the way we manage and present a sense of self in twenty-first century society.