In recent years, the proliferation of digital technology has brought significant advancements in how we communicate, work, and entertain ourselves. However, this technological revolution has also given rise to new forms of behavioral addiction, collectively referred to as Internet or technology addiction. This chapter presents the history of Internet addiction, starting with its inception and historical evolution, before summarizing recent insights into the epidemiology, etiology, pathophysiology, clinical features, diagnostics, and medical and psychiatric comorbidities associated with the condition.