This groundbreaking collection advances understanding of the concept of media practices by critically interrogating its relevance for the study of citizen and activist media. Media as practice has emerged as a powerful approach to understanding the media's significance in contemporary society. Bringing together contributions from leading scholars in sociology, media and communication, social movement and critical data studies, this book stimulates dialogue across previously separate traditions of research on citizen and activist media practices and stakes out future directions for research in this burgeoning interdisciplinary field. Framed by a foreword by Nick Couldry and a substantial introductory chapter by the editors, contributions to the volume trace the roots and appropriations of the concept of media practice in Latin American communication theory; reflect on the relationship between activist agency and technological affordances; explore the relevance of the media practice approach for the study of media activism, including activism that takes media as its central object of struggle; and demonstrate the significance of the media practice approach for understanding processes of mediatization and datafication. Offering both a comprehensive introduction to scholarship on citizen media and practice and a cutting-edge exploration of a novel theoretical framework, the book is ideal for students and experienced scholars alike.