Subway, founded in 1965, has grown to become the world's largest submarine sandwich chain with over 37,000 locations globally and significant expansion plans in India. The company's franchising model allows for rapid growth and brand recognition with local entrepreneurs, although it faces challenges in brand awareness and competition from established rivals. Despite substantial benefits for both franchisors and franchisees, Subway contends with issues like outdated branding, fierce competition, and financial risks from market fluctuations.