What makes you the best fit for this organization? Talk to the hiring manager about the areas that are the best fit for you, and how that will benefit them should they choose to hire you.
"When I initially read your job posting, I knew that this role was a perfect fit for me. Your company vision and mission are exactly what I personally aim to achieve in my career as well. If you were to offer me a position, I would make a positive impact immediately because I have a strong understanding of your company's goals."