@chii1210 "would" means a possibility to do something. "If you had the money, where WOULD you vacation?" "will" can be used for possibilities but it's more about something that is already happening or you've decided to do. Will deals with decisions or outcomes that already are happening or need to happen. "Where will you go on vacation?" is different than "Where would you go on vacation" because will indirectly says that the person being asked already is going on vacation and the speaker just wants to know where they're going.