A stock broker is a professional who buys and sells stocks and other securities on behalf of clients. They work for individuals or institutions, helping them invest in the financial markets. Stock brokers provide advice, execute trades, and manage investment portfolios to help clients achieve their financial goals. To become a stock broker, one typically needs a bachelor's degree in finance or a related field, along with relevant licenses. They must pass exams administered by regulatory bodies, such as the Financial Industry Regulatory Authority (FINRA). Stock brokers play a crucial role in the economy by facilitating the flow of capital in the markets.