This is the 91st most frequent Serbian word.
добро
"Добро" in English means "good" or "well."
In this context, 'добро' is used as an adjective meaning 'good', referring to one's state or mood.
Добро сам, хвала.
I'm good, thank you.
Here, 'добро' is used as an adverb, modifying the verb 'делујеш' (seem), meaning 'well'.
Делујеш добро данас.
You seem good today.
In this sentence, 'добро' is used as a noun meaning 'good', indicating the favorable quality of planning ahead.