The Mujina Bandits Arc in Boruto plays a significant role in Boruto's growth as a ninja. During this arc, Boruto faces challenging situations that test his skills, judgment, and teamwork abilities. He learns the importance of using his intelligence and strategic thinking in difficult missions, develops a stronger sense of responsibility, and gains valuable combat experience. This arc also highlights Boruto's determination to protect his friends and the village, showcasing his growth and maturity as a ninja.