Tell a story. Take your qualification and share a brief story that illustrates how you’ve effectively used it in a previous work experience. Begin by discussing what you believe the employer is looking for, and then explain, using your qualification and your anecdote, how you fulfill that need. Your answer should be no more than one to two minutes long. Remember that employers hire workers to solve a problem, whether it’s boosting sales or streamlining processes or building a brand. Your goal when making your pitch is to show that you’re the best person to solve that problem. Interviewers ask questions about why you should be hired to measure how you qualify for the job and fit in with the company.
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.