Eustress is defined as positive stress that improves well-being rather than causing harm. Examples of eustress include exercising, engaging in suspenseful media, and childbirth. Eustress provides benefits like boosting brainpower through neurochemical production, temporarily increasing immunity through immune cell stimulation, building mental strength through repeated exposure to stressors, enhancing creativity through pushing one out of their comfort zone, and motivating success through deadline pressures. Moderate prenatal stress can also positively influence child development.