What feedback did you receive at your last job?
The interviewer wants to not only find out what kind of feedback you may have received in the past from managers but, more importantly, determine how you handled it. You will want to show the interviewer that you were open to receiving your supervisor's feedback, took it constructively, and used it to better yourself and your work performance.
"At my last job, my manager told me that I was spending too much time on certain accounts. I realized that I had become so immersed in those specific relationships (because I saw huge opportunities there) that I wasn't paying enough attention to some of my other accounts. I recognized that he was right and from that point forward I made sure to better allocate my time and energy across all of my accounts."
"My manager at my previous job informed me I needed to prioritize clients more effectively during a time when I was still new to the industry. He took the time to meet with me and helped me focus on a better methodology. With that feedback, I successfully created an improved tracking system and therefore created an opportunity to spend my time on other areas of priority."