Your question is Designing Through Vague Requirements. Take a moment with it on the right.
Talk me through your thinking if you like. When you're confident, submit your answer and I'll grade it like a real screen (7/10 or better passes).
Walk me through a time when you had to design a product feature with highly vague requirements. How did you turn that ambiguity into a concrete plan, and how did you validate that your approach was the right one before scaling it?