A stock broker is a professional who helps clients buy and sell shares of stock on the market. Stock brokers typically work for banks or other financial institutions, and they must be licensed by the financial regulator in their country.Stock brokers play an important role in the financial markets, as they help connect buyers and sellers of shares. They also provide valuable advice to clients on which stocks to buy and sell, based on their knowledge of the market.Becoming a stock broker requires completing a degree in finance or a related field, passing an exam, and completing training at a brokerage firm. Stock brokers must also stay up to date on developments in the market, so that they can provide accurate advice to their clients.