The purpose of this literature review is to describe youths' involvement in cyberbullying. The term “youths” refers to individuals in elementary school, middle school, and high school. The chapter begins by providing a description of cyberbullying and the definition of cyberbullying. The next section describes the characteristics and risk factors associated with youths' involvement in cyberbullying. The third section focuses on the psychological, social, behavioral, and academic difficulties associated with youths' involvement in cyberbullying. The chapter concludes with recommendations for schools and parents as well as recommendations for future research. The chapter draws on research utilizing quantitative, qualitative, mixed-methods, cross-sectional, longitudinal, and cross-sequential designs, and those from various disciplines, including psychology, communication, media studies, sociology, social work, and computer science.