There are lots of reasons a person may choose to become a certified nursing assistant and the act of seeking certification implies a dedication to standards of care for the industry. Think through the reasons that you became certified and explain them to your advantage in the interview. Although the pay may be better, that should never be the driving force behind your decision. It is better to lead with information about your dedication to being excellent in your field, using certification to explore the possibility of advancing into a nursing career. This is a good question to answer regarding your love of caring for people and wanting to add value to your work.