The interviewer asks this question to identify the factors that motivate and drive your success. Rather than focusing on tangible rewards or compensation, give them insights into what motivates and inspires you on a deeper level. Exhibit that you don't easily burn out, and share the tips, tricks, and tools you utilize to ensure you maintain your productivity throughout your day. Detail your approach to your work, regardless of the task. You want to advertise how adaptable you are, how well you'll complement their team, and how well you work with others.