The purpose of the stock market is to support business growth through mutual benefits. Companies raise capital by selling stock, which allows them to expand. For example, a young couple started a small furniture business called Super Star Furniture. After 10 years of growth, they wanted to expand to new cities but needed over 1 crore rupees. To obtain this funding, they decided to sell 40% of their company stock. This raised 2 crore rupees for expansion and increased the total value of the business. Within a year, both the couple's ownership value and total profits had increased, demonstrating how the stock market enables business growth.