Answering this question depends on the type of work offered and how much you know about the company concerned. You need to stress the particular type of organisation in relation to your own skills, strengths and personality. Your ideas about what you would do if offered the job are worth contributing here. Try to make the case for a good match between the company’s aims and outlook and your own. Enthusiasm for what you can offer will be much more impressive than what you hope to gain by getting the position.
Try to give the impression that your career so far has been leading you to this point today.