What would make this internship successful for you?

"Earning a permanent role in this organization would make this opportunity successful for me. I hope to learn what it takes to get hired and be a valuable employee for the team."

Understanding your expectations and goals is important for both you and the interviewer. Don't be afraid to express what you'd like to gain from this experience. Tell the interviewer about your hope to earn a permanent position, experience, exposure, or knowledge if these are the things that would deem the internship successful for you. The interviewer will be able to give you an idea of whether your goals are attainable and maybe even advice on how to ensure your internship is successful.