As you answer this question, you should be able to identify and express what keeps you showing up, working hard, and supporting your team. Your motivation may be that the idea of success and achievement drives you. Perhaps you are working towards career advancement. Take some time to think about what truly motivates you. You want to avoid saying that you do not need the company to keep you motivated, that you can do it on your own. Even the best leaders need outside motivation from their superiors and those they work with. The interviewer wants to see what they can do to help you shine in your position and keep you motivated and inspired as their next Medical Science Liaison.