A cover letter is a document typically submitted alongside a job application, resume, or CV (curriculum vitae). It is a personalized letter that introduces the applicant to the potential employer, providing additional information about their qualifications, experiences, and interest in the job. The purpose of a cover letter is to complement the resume and provide context for the applicant's suitability for the position.
Watch this quick video that explains how you can write an effective cover letter that will help you stand out to employers.