Why do you want to apply for this job?

By this question, the interviewer would like to assess as if you actually find yourself fitting to this job. Hence your answer must be factual depicting how your skills and aspirations match the job you’re applying for. You should also express that you completely understand the roles & responsibilities of the job title. An ideal answer must consists of:

1. Your understanding about the roles & responsibilities.
2. Your skills match the job requirements.
3. What fascinated you about this job.

Example: 

I have excellent communicative skills and I’m a good listener too. I also have good analytical and problem solving skills. I believe I can make the best use of these skills as client relationship manager. It’s also a great privilege to work as the face of your esteemed organization at this title and I see it as a great opportunity to grow with this company.