McDonald's began as a barbecue restaurant opened by Richard and Maurice McDonald in 1940. Ray Kroc franchised their restaurant in 1955 and later bought the whole chain. McDonald's expanded aggressively throughout the US and overseas in subsequent decades. It now serves 70 million customers daily across 118 countries. McDonald's emphasizes quality, cleanliness, service, and affordability. It strengthened its brand through iconic products, marketing campaigns, and tailored offerings in different markets. McDonald's faces risks from competition and health concerns but maintains relevance through innovation.