A cover letter must accompany and be tailored to any application you submit. STEM letters should not exceed one page.Introduce yourself: Mention the university you attend, your degree program, and when you expect to graduate. A cover letter is the first thing employers see when sifting though applicants, making it just as important as your resume. A good motivation letter for applying for. What is the Basic Format? This guide provides an overview of the key components of a cover letter. Your cover letter should focus on how your unique background fits the unique job position. A cover letter should not simply repeat the details from your resume. Many candidates neglect to submit cover letters but a cover letter can provide you with an opportunity to stand out and show you are serious about the position.