A taxable brokerage is an account that you open at a brokerage firm, who holds your investments for you. Money in a taxable brokerage is, as the name implies, subject to tax. The investments will be subject to capital gains taxation if they grow (hopefully) and will be subject to capital losses if they lose money (bummer). Taxable brokerages come in many different forms, giving investors lots of options to invest in, such as stocks, bonds, mutual funds, ETFs, and so on.
These accounts are different from your retirement accounts and allow you to take your money out at any time (although you will still have to pay taxes if you take the money out and it has grown). You can also put in as much or as little money as you want, unlike your retirement accounts.
