A cover letter is a letter sent with a resume to introduce yourself to a prospective employer, explain why you are interested in the position and company, and highlight your relevant qualifications. The cover letter should be tailored to the specific job by mentioning skills that meet the company's needs from the job posting. It is typically one page and includes an introduction, highlights of what you can offer the employer, and a call to action asking them to review your resume. Cover letters come in two forms - letters of application for a specific job listing, or letters of inquiry to obtain informational interviews or conduct research.