Amul is a dairy cooperative in India owned by millions of milk producers. It has grown to become the largest food brand in India through a unique business model that collects milk directly from farmers and converts it into branded products. Amul uses a low-cost marketing strategy, emphasizing low prices and advertising campaigns like the iconic Amul girl. It faces competition from other major brands but has expanded its product range and international markets to maintain its leading position in India's dairy industry.