What is the best answer for this question What can you contribute to the organisation/company if we hire you?

Well, I can give most of my knowledge , best of my experience ,and exchange views of how can I help in improving areas of interest related to my job function. 

• I will bring my unique vision to your company. I am experienced in the many areas related to this company’s current goals, including expanding international sales. For example, I helped improve international sales at a previous company by over 25%. My sales background, along with my ability to plan ahead, will help facilitate that growth.

I don't intend to be hired. But if I would have decided to join, I would have contributed to modernisation, expansion, quality improvement, improving market share and the productivity.