⟩ Explain how do you typically measure your results?
You're not looking for specific tools here, but rather how the freelancer sets KPIs - how they determine what's most important to measure when working on a project. The best answer is going to say something like "it depends on your goals, but in the past I have…" and then they break into specific examples of KPIs determined, how they set benchmarks and how they measured against them.