What is the best answer to "why should we hire you?" asked in the job interview?

If you hire me then as per the company projection 

I can help the company in many ways like define the growth of the company in a different manner with a projection I also can tell that if company likes then company takes me 

The interviewer’s job is to hire the best person for the position. Most of the candidates that make it to the interview stage are qualified for the job. The winning candidate must be more than qualified, especially in a very competitive job market.

Every hire is a risk for the company. Your interviewer will also be taking a personal career risk in recommending a particular candidate to hire. If the candidate performs well, Mr. Interviewer looks brilliant and gets a pat on the back (and maybe a bigger annual bonus).

If the candidate turns out to be a dud (doesn’t perform well, doesn’t get along with the team, leaves the job prematurely, etc.), the interviewer looks like a dummy and his professional reputation suffers.

With this question, your interviewer is asking you to sell him on you and your status as the best person for the position. Make his job easier by convincing him that:

• You can do the work and deliver exceptional results
• You will fit in beautifully and be a great addition to the team
• You possess a combination of skills and experience that make you stand out from the crowd
• Hiring you will make him look smart and make his life easier.

This is your chance to wow them with your highlight reel. Your answer should summarize the top three or four best reasons to hire you. It’s better to have three or four strong reasons with memorable descriptions and/or examples than to rattle off a laundry list of twelve strengths without context.

This is an opportunity to  reiterate your most impressive strengths and/or describe your most memorable selling points, tailored to align with the top requirements in the job description. Your 3-4 bullet points could include a combination of the following:

• Industry experience
• Experience in performing certain tasks or duties
• Technical skills
• Soft skills
• Key accomplishments
• Awards/accolades
• Education/training