The Executive Functions are involved in diverse domains such as cognitive and social development, environmental adaptation, learning, academic performance, job success, psychological well being, physical health, among many others. What are Executive Functions? How do they differ from other cognitive functions? On what processes and domains are they involved in? Do they constitute a unitary or multidimensional construct? What are its main components? This book’s main objetive is to explain in a friendly way, using typical examples of everyday life, the way in which the executive functions are involved in our daily activities, its main characteristics and properties and differences with other cognitive functions.