Half of the internet will tell you cover letters are obsolete. The other half will tell you they are essential. The honest answer is that a great cover letter still helps in some situations - small companies, hiring managers reviewing applications directly, roles where the fit is obvious to you but not obvious from your resume - and a bad one quietly hurts you in all of them.

What a strong cover letter does

A useful cover letter answers, in three short paragraphs, the only question a hiring manager actually has when they pick yours up: why are you, specifically, sending this, specifically, to us?

It is a focused argument, not a personal essay. It is not "I have always been passionate about helping people," and it is not a restatement of your resume in narrative form. It is an explicit connection between something on your resume and something the company actually does.

The three-paragraph shape

  1. Why this role. One or two sentences explaining what specifically caught your attention about this opening. Avoid generic praise of the company. Name something concrete: a product, a recent move, a problem the role is clearly solving.
  2. Why you can do it. Two to four sentences linking your most relevant experience to that specific role. This is where you point at a particular bullet on your resume and explain why it is directly applicable here.
  3. A clean close. One or two sentences signaling interest and availability. No grand promises. No "passionate about." Just "Happy to talk further" or "Available to walk through any of this on a call."

What to leave out

  • Your life story. Hiring managers are not reading a memoir.
  • The phrase "I am the perfect candidate." Let the content of the letter make that argument.
  • A bullet list of skills. That belongs on your resume.
  • Boilerplate about the company's mission. They wrote it; they do not need you to recite it back.

How to tell when one is worth writing

Skip the cover letter when the application form has a dedicated "why this role" question - that field is your cover letter. Skip it when applying through a recruiter who tells you not to bother. Write one when the company is small, when you have a non-obvious reason for applying, when you are switching industries, or when you have a personal connection worth surfacing.

A short worked example

Hi [Hiring Manager],

I saw your posting for a senior product designer focused on your billing surfaces. I have spent the last three years designing billing and subscription flows at a B2B SaaS company, and the move you outlined in the role description - from a single plan to consumption-based pricing - is exactly the problem I shipped a redesign for last year.

The work I am proudest of from that project is a rebuild of the upgrade flow that reduced confused-tier support tickets by roughly 40%. I would be glad to walk through the actual artifact and what I would do differently if I were starting today.

Either way, thank you for considering my application. Happy to set up time to talk if useful.

That is the entire game. Specific, short, and pointed at the role you are actually applying for.