Cover letters are important because they are a formal letter to an employer. You list the exact job you want and why you are qualified for this position. Even though it is a short letter, it gives you the opportunity to highlight all of your achievements and reasons you would be the best for the job. Also, I learned to include something you like about the company, showing you did research and you are serious about being interested. Always end your cover letter with the best ways to contact you and that you are eagerly awaiting the interview to follow.