A stock broker is your entrance to stock exchanges . Stock broker is the most important and essential part of share market . It’s a corporate organisation registered with SEBI & hold stock broking license . They provide services to an individual starting from opening of a trading & demat account . In simple terms if you want to buy or sell a share of any company in stock exchange you need to have a trading account . This will be provided to you by the stock broker . Brokers act as a middleman or mediator between you and exchange .