A stock broker is a professional who helps people buy and sell shares of companies in the stock market. They act as intermediaries between investors and the exchanges where stocks are traded. Stock brokers provide valuable advice, research, and insights to help clients make informed decisions about their investments. Many stock brokers work for firms, but some operate independently. They earn money through commissions on trades or by charging fees for their services. With the rise of online trading platforms, individuals can also trade stocks directly, but many still seek the expertise of a stock broker for guidance and support.