Best Buy's core values are unleashing the power for their people, learning from challenges and change, showing respect, humility, and integrity, and having fun while being the best. Your interviewer may not expect you to know every one of the company's core values word-for-word, but it is still a good idea to research the company and familiarize yourself with Best Buy's values before your interview.
Identify the qualities that will help you fit the environment that Best Buy's values create. Tell the interviewer how you intend to support and uphold those values.