This book contributes to the scholarly debate on the forms and patterns of interaction and discourse in modern digital communication by probing some of the social functions that online communication has for its users. An array of experts and scholars in the field address a range of forms of social interaction and discourses expressed by users on social networks and in public media. Social functions are reflected through linguistic and discursive practices that are either those of 'convergence' or 'controversy' in terms of how the discourse participants handle interpersonal relations or how they construct meanings in discourses. In this sense, the book elaborates on some very central concerns in the area of digital discourse analysis that have been reported within the last decade from various methodological perspectives ranging from sociolinguistics and pragmatics to corpus linguistics. This edited collection will be of particular interest to scholars and studentsin the fields of digital discourse analysis, pragmatics, sociolinguistics, social media and communication, and media and cultural studies.