Why is it advantageous for candidates to stay in contact with prospective employers after an interview? Provide at least three reasons

What will be an ideal response?

Answer: Staying in contact with a prospective employer after an interview shows that you really want the job and are determined to get it. Doing so also gives you another chance to demonstrate your communication skills and sense of business etiquette. Following up reminds the interviewer that you're a serious candidate who's looking for employment, and that you're waiting for the decision.
A good way to stay in touch with prospective employers is by sending follow-up (thank-you) notes within two days of each interview. You'll be practicing good business etiquette and showing that you're willing to go the extra mile.