Purpose of a Cover Letter. It is your introduction to the employer and an opportunity to state your interest in the position and the company.Cover letters should be one page in length, and three to four paragraphs long. Identify the position and the organization. State the position for which you are applying, where you heard about it, and if applicable, the name of the person who referred you. Always write a cover letter from scratch. Get the first Georgia Tech Alumni cover letter template. Try to include "buzz words" from the posted job description. A cover letter is a great way to show how your experiences, characteristics, and skills align with a job or internship opportunity. Try to include "buzz words" from the posted job description.