Basically, a brokerage account facilitates to purchase and selling of investment product that you have.
It could be a stock, bond, currencies, mutual funds, futures and options contracts.
However, the amount of brokerage depends on broker to broker.
Brokerage accounts could be taxable or tax-deferred.
A taxable brokerage account is one which applies tax on the money you earn from investments.
However, if your objective is capitalizing for retirement, the best option would be to open an IRA or Roth IRA.
Both of these account offers additional discount and tax benefit for retirement plans.
However, if you are not investing with retirement in mind, a conventional taxable brokerage account would be the only option.