Example: “What I liked most about my last position the ability contribute in a collaborative way with other teams. Each team member was encouraged to bring new ideas to the project which were respectfully considered by all. For example, we once worked with a client who was relying on us to solve a critical issue. Our team met to discuss the situation. After I recommended a plan to resolve the issue, we took time considering the pros and the cons of the solution, building on how to make the idea better and more comprehensive. When we implemented it, it worked better and faster than everyone expected. The client was very pleased.”
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.