Use commas and sabe lives š.
Proper comma placement is extremely important in certain languages such as English and Portuguese. In fact, it is an extremely sensitive issue. Doing it incorrectly can change the entire meaning of a sentence!
*Use commas to isolate the vocative*
Vocative means āthe person you are callingā. If you want to call someoneās
"Joana, traz-me esse documento."
"Sofia, vai comprar cenouras."
āĆ Deus, valei-nos!ā