Definition
Used to inquire about the purpose or benefit of doing something.
有什麼用呢？
What good is constantly complaining? You should try to solve the problem instead.
不斷抱怨有什麼用？你應該試著解決問題。
What good is making a plan if we don't have the resources to execute it?
如果我們沒有資源執行，制定計劃有什麼用？
What good is all the effort if we don’t work together as a team?
如果我們不作為一個團隊合作，所有的努力有什麼用？