Spend: å tilbringe eller å bruke

I know the main translation of the verb "å bruke" is "to use", but Duolingo has been teaching me another use of the verb, like in the sentence: "Vi må bruke tid på det", translated: "We have to spend time on that".

So when do I use the verb "å bruke" instead of "å tilbringe"? Also, would the sentence "Vi må tilbringe tid på det" be correct?