Use your cover letter to describe your qualifications as well as your interest in both the job and organization so the employer will want to interview you. Always write a cover letter from scratch.I'm going to share with you the three part structure to create a bulletproof cover letter that gets you more interviews. Learn how to write a cover letter for a job with tips from career experts. Browse professional examples to impress hiring managers. A cover letter usually is three paragraphs long and outlines why you are applying for a specific position, a brief overview of your professional background. State the position you are applying for, how you found out about it, and ask for consideration based on your skills and experiences you have to offer.