Shoe companies are businesses that design, manufacture, and sell footwear. They produce a wide range of shoes, including athletic shoes, casual footwear, and formal shoes. Some well-known shoe companies include Nike, Adidas, and Puma, which focus on sports and performance shoes, while others like Clarks and Dr. Martens specialize in casual and dress shoes. These companies often invest in research and development to improve shoe technology, such as cushioning and support. They also engage in marketing strategies to promote their products, using endorsements from athletes and celebrities to attract customers.