I could not remember what Dove meant, and when I hovered over the words Dov'è the hint didnt help me cause it just repeated the word saying Dov'è again. There was no hint.
In such a case you should report a feedback saying that the dictionary hint is not helpful, but I think Duolingo is not working massively on improving it at the moment.
Now you should anyway know that "Dove" means "Where".