This fact sheet was written by Béatrice Lamboy based on the CPS Volume 1 guide published by Santé publique France. It focuses on the first general emotional psychosocial competency (CPS) and provides a summary of a specific emotional psychosocial competency: Understanding Emotions (E1.1). Understanding emotions involves gaining a better understanding of the nature and function of emotions and developing two main areas of psychological knowledge: Knowledge 1: Understanding the nature of emotions (components, links to cognitions and behaviors, generation through psychological needs and triggers, various types); Knowledge 2: Understanding the function of emotions (informational function and function as a driver for action). This specific competency can be applied during CPS activities. Thus, following a theoretical section, practical examples are presented for adults, adolescents, and children.