A top-notch thank you letter starts with a simple communication funnel that includes the following:
Create an awareness about the organization, what they do, what stands out, and your understanding about the industry. Call out details! Do your research and pull keywords that they use on their website.
INTEREST AND ABILITY
Demonstrate your excitement and strong interest in the company, position and your ability to be a perfect cultural and technical fit within the organization. Calloutanything technical or skill-wise that you know is important in the role. Use detail.
Address any shortcomings that you feel may be significant and speak to any potential concerns that you believe the interviewer may have. Examples may be an area of weakness such as location, longevity, or being too seasoned, or too early on in their career.
Reinforce your genuine interest in the company and the role.
Get more details and examples here – Flyer_ThankYouLetterAfterInterview