What does a stock broker do ?

A broker is an individual who is paid a commission for executing customer orders. A floor broker is one who executes orders on the stock exchange floor, or an upstairs broker who handles retail customers and their orders. A broker is also a person who acts as an intermediary between a buyer and seller, usually charging a fee or commission. A broker who specializes in stocks, bonds, commodities, or options acts as an agent and must be registered with the exchange where the securities are traded.