Self-efficacy is significant in health behavior change as it reflects an individual's belief in their ability to succeed in specific tasks. This confidence influences motivation and perseverance, leading individuals to adopt and maintain healthier lifestyles. High self-efficacy encourages setting and pursuing challenging goals while managing setbacks more effectively. When individuals believe they can change, they are more likely to engage in exercise, make healthier food choices, and adhere to wellness programs, ultimately enhancing their health and well-being.