Understanding digital addictions paves the way for an in-depth exploration of the topics discussed throughout the book. This chapter primarily aims to define and characterize behavioral addictions related to the use of digital media, shed light on the prevalence and social impact of these addictions across diverse populations, and establish comparative lines between digital addictions and common psychological disorders such as anxiety, depression, and ADHD. It also aims to highlight risk and protective factors influencing the development of these addictions and to elucidate the differences and similarities between behavioral addictions and substance dependency. This chapter is designed to establish a solid knowledge foundation, enabling readers from various backgrounds to grasp the complexity and multidimensionality of digital addictions. By offering a comprehensive overview, it lays the groundwork for a deeper discussion of each specific addiction in subsequent chapters, ensuring the reader attains a holistic understanding of both theoretical and practical aspects of digital addictions.