The document discusses the concept of emotion differentiation (ED), which refers to the ability to identify and label emotions with precision, and how it relates to emotional well-being, particularly in adolescents. It explores various studies indicating that higher ED is linked to better mental health outcomes, including lower depressive symptoms and more effective emotion regulation. Furthermore, the document highlights a developmental pattern where ED appears to decrease during adolescence before increasing into adulthood, suggesting that promoting ED skills during this critical period could help mitigate emotional problems.