McDonald's is the world's leading hamburger chain serving over 70 million customers daily. It has always emphasized its core values of quality, service, cleanliness, and value. McDonald's built a strong brand through consistency, innovation, affordable pricing, customer service, and brand equity. However, rapid expansion led it to lose focus on customer service. It also faced challenges from health concerns and increasing competition from brands offering healthier options. McDonald's responded by refocusing on quality food, removing supersized options, and adding more healthy choices like salads. It has since improved its restaurants and menu while continuing global expansion.