The purpose of a cover letter is to introduce you, connect your experience to one specific job, and give a hiring manager a reason to interview you, in a way your resume cannot. Your resume lists what you have done. Your cover letter explains why it matters for this role, at this company, right now.
That distinction is the whole point, and it is where most cover letters fail. They repeat the resume in paragraph form and waste the one chance you have to sound like a person with a reason for applying. This guide breaks down what a cover letter is actually for, the specific jobs it does, how it differs from your resume, and whether it still matters in 2026.
