Compare your goals with the objectives of the company and the position, then reiterate why you would be an asset to the employer. Let the interviewer know what you can do for the company, if you get a job offer.

Even though the question is about why you want to work here, you still need to convince the interviewer that hiring you will benefit the company.

This company is internationally known for its (widgets), and my experience in the (marketing/planning/production/etc.) of (widgets) has me intrigued by the opportunity this position presents.