This book investigates interaction-focused scholarship on online communication. It focuses on a broad range of online contexts including social media, dating apps, online comments, instant messaging and video-mediated interaction. Bringing together experts from a variety of scholarly backgrounds, chapters demonstrate how different microanalytic methods, including conversation analysis, membership categorization analysis and discursive psychology, can be applied to online communication. The book also goes on to address ethical, methodological and theoretical issues of analysing online social interaction. With the explosion of the use of online platforms for everyday and institutional interaction, this book is a timely collection which explores the current state of the field, and considers future directions for microanalysis of online communication.