The interviewer wants to see that you are self-aware and understand the type of manager or employer that brings out the best in you. It will also help them ascertain how familiar you are with navigating the five main leadership types; authoritarian, participative, delegative, transactional, and transformational. The example you offer will provide insight into the values and principles that make up your character, your work ethic, and your motivators. By gaining this deeper understanding of your character, your interviewer will be better able to ascertain how well you'll fit in with the culture of their brand.