Always include a cover letter with your application unless specifically instructed not to. You want to highlight your interests, skills and experience that most closely match the requirements of the position and the employer.Your cover letter should. Make sure your resume has the relevant skills to the internship or job you're applying to. View helpful documents and videos for your career journey, covering topics from resumes, cover letters, networking, communication, and more. The letter should capture the employer's attention, show why you are writing, indicate why your employment will benefit the company, and ask for an interview. In the body of your cover letter, highlight your relevant skills and experiences that directly align with the job description. First, focus on the "what you'll do" portion. The first few bullets are the most important.