What Is a Cover Letter?

A cover letter is a short written document that an applicant sends to an employer alongside a CV or résumé when applying for a job. Its purpose is to introduce the applicant, explain why they are interested in the role, and set out briefly why they are a good match for it. Where a CV lists qualifications and experience in a structured format, a cover letter presents them in prose, connecting an individual’s background to the specific position and organisation. It is often the first thing an employer reads, and it frames how the CV that follows is received.

What a cover letter is for

The core job of a cover letter is to persuade the reader to take the application seriously and to read the CV with interest. A CV shows what someone has done; a cover letter explains why that experience is relevant to this particular vacancy and why the applicant wants it. It offers a chance to highlight the most pertinent achievements, to demonstrate knowledge of the employer, and to convey motivation and personality in a way that a list of bullet points cannot. In effect, it answers an unspoken question in the reader’s mind: why should I consider this person for this role?

How it differs from a CV

A cover letter and a CV serve different but complementary purposes, and a good cover letter does not simply repeat the CV in sentence form. The CV is a factual, structured summary of education, work history and skills, usually spanning one or two pages. The cover letter is a tailored, persuasive piece of writing, normally no longer than a single page, that selects a few key points and explains their relevance. Sending one without the other leaves an application incomplete: the CV provides the evidence, while the cover letter provides the argument for why that evidence fits the job.

What a cover letter usually contains

Although styles vary, most cover letters share a common structure:

• An opening that states the role being applied for and, where possible, addresses a named person rather than a generic greeting.
• A middle section that links the applicant’s skills and experience to the requirements of the job, giving a small number of concrete examples.
• A note on motivation explaining why the applicant is interested in this employer and this position specifically.
• A closing that thanks the reader, indicates availability for interview and signs off politely.

Careers guidance from bodies such as the UK National Careers Service stresses keeping it concise, clear and free of errors.

Tailoring and tone

A defining feature of an effective cover letter is that it is tailored to the specific role rather than sent unchanged to many employers. This means referring to the actual job title, reflecting the requirements listed in the advertisement, and showing some understanding of the organisation. The tone is generally professional and courteous, matching the formality of the field, and the letter is expected to be well presented and carefully proofread. Because it is a sample of the applicant’s written communication, its clarity and accuracy are themselves part of the impression it creates.

Why the cover letter matters

In competitive applications, where many candidates may have similar qualifications, a cover letter can be the element that distinguishes one applicant from another. It gives context that a CV alone cannot, demonstrates genuine interest, and shows an employer how a candidate communicates. Not every application requires one, and some online systems replace it with structured questions, but where a cover letter is invited it remains a valued part of the hiring process, and a well-judged one can make the difference between an application that is read closely and one that is set aside.