A broker is a person or firm that acts as an intermediary between buyers and sellers in various markets, such as finance, real estate, or insurance. Brokers help clients make informed decisions by providing advice, market analysis, and access to different products or services. They typically earn a commission or fee for their services. In the financial world, a broker can facilitate the buying and selling of stocks, bonds, and other securities on behalf of clients. They may work for a brokerage firm or operate independently. Some brokers specialize in specific areas, such as real estate or insurance, to better serve their clients' needs.