Well-being (positive psychology) is the scientific construct representing the state of optimal human functioning and flourishing, characterized by the presence of positive psychological and social states and capabilities, beyond the mere absence of illness. Within positive psychology, this concept encompasses theoretical models and empirical research investigating factors such as subjective life satisfaction, positive emotions, engagement, meaning, positive relationships, and accomplishment (e.g., PERMA model), or psychological dimensions like autonomy, personal growth, and purpose (e.g., Ryff's Psychological Well-being). It is a core concept shifting psychological inquiry towards understanding and promoting human strengths, resilience, and the elements that contribute to a fulfilling life.