Basically your account choices comes down to choosing between a taxable brokerage account and tax-favored retirement account just like IRA or 401(K).
Taxable brokerage account is the basic account of investing where you investments sooner or later will get taxed.
But when you are opening an IRA account. It then involves choosing which specific type you want. SEP IRA, Roth IRA or traditional IRA are just examples.