This book explores communication on Facebook developing the new theoretical concept of context design as a way of understanding the dynamics of online interaction Against a backdrop of fake news & other controversies surrounding online political debate the authors focus on inadvertent acts of offence on Facebook; that is when users of the site unwittingly offend or are offended by the airing of political or religious views or of opinions deemed racist or sexist Drawing on a survey of Facebook users they explain why instances of offence occur & what users report doing in response They argue that Facebook users contribute to the construction of a particular social space one that is characterised by online conviviality & a belief that Facebook is not the place for serious debate These views in turn shape the kind of political debate that can take place on the site This thought-provoking book will appeal to scholars & students of applied linguistics & anyone interested in the role of social media in contemporary political & social life