If your interview is over, that doesn’t mean the application process over. Performance in interview is not only thing that determines your success but also you could add “Thank You” letter in that.
Thank you letters is the most important thing of the after-interview stage, As some employers think less of those interviewees who fail to follow-up promptly. if you really interested the job then always send a personalized Thank You letter to the hiring manager. Your Thank you letter will indicate that your still interest in the position, this attitude shows your professionalism that can not be beat. Use resume heading as a subject line or simply reply to previous e-mail. Also, Mention the highlights the points of your meeting with the manager. This will help to remind that person of the skills and qualifications
If there were some topic that you forgot to mention during the interview, such as your ability or skill sets or to work extra hours and take on extra responsibilities, along with any past evidence that happen with you also keep in mind that your letter should be in a brief. A thank-you letter is the perfect way to add this.