After a job interview, it is a great idea to follow up with a thank-you letter. Taking the time to write up a thank-you letter can leave the interviewer with a more positive impression.
Sending a thank-you letter is very important. First reason, it shows good manners on your behalf. In addition to good manners, you are also instilling your name in front of people one last time which exudes confidence and personality. You want to be able to sell yourself as much as you can when going to an interview, even if it is a follow up thank-you letter.
When composing the thank-you letter, make sure to highlight experiences and skills that are a great match for the current position. In addition, if you forget to mention anything in the interview, this provides a perfect opportunity to bring it up. Composing the thank-you letter can be done in writing or by email.
A good guideline for when to send the thank-you letter is within the 24 hours of the interview. Not only does it show promptness, but the interview is fresh in your mind. If the interview is fresh in your mind, it will be easier to compose the letter with details of the interview. If the process is delayed, you may forget to write the letter. By that time the company may have already decided a candidate.
Source: https://www.thebalancecareers.com/job-interview-thank-you-letter-examples-2063964
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