This is a tough question to answer without dipping into platitudes. Try sharing leadership examples instead. Say, "The best way for me to answer that is to give you a few examples of leadership challenges I've faced," and then share situations where you dealt with a problem, motivated a team, worked through a crisis. Explain what you did and that will give the interviewer a great sense of how you lead.

How Interview Questions and Answers?

“I’ve heard great things about the work environment here from a few colleagues. And when I saw this job posting, it seemed to match my skills very closely. For example, I saw on the job description that you need somebody who’s an expert in Java programming. This is what I focused on in both of my previous positions, and was even the focus of my academic work before graduating university. I consider myself an expert in Java and it’s a skill I hope to continue specializing in.”

Example: “What makes me unique is my experience of having spent four years in retail. Because I’ve had first-hand experience fielding shoppers’ questions, feedback and complaints, I know what customers want. I know what it takes to create a positive consumer experience because I’ve had that direct interaction, working directly with consumers in person.”
You can start by reviewing the top 50 popular interview questions asked by employers, as well as the sample answers for each question on the list. Click through to the Best Answers links to get tips on what information you should include in your response - as well as what details to leave out. You can expect to hear at least one - and likely more - of these questions during your next job interview.
Any candidate can read and regurgitate the company’s “About” page. So, when interviewers ask this, they aren't necessarily trying to gauge whether you understand the mission—they want to know whether you care about it. Start with one line that shows you understand the company's goals, using a couple key words and phrases from the website, but then go on to make it personal. Say, “I’m personally drawn to this mission because…” or “I really believe in this approach because…” and share a personal example or two.