A Short Cover Letter That Actually Adds Something
Use one relevant example instead of repeating every line of your résumé.

A cover letter can explain a connection that is not obvious from your job titles. It is especially useful when your experience comes from another industry or you have a specific reason for choosing the employer. Follow the application instructions about whether one is required.
Give each paragraph a job
Identify the vacancy and your interest. Explain one relevant example. Close with a straightforward invitation to discuss your experience. A short letter with specific evidence is more useful than a long list of flattering adjectives.
“I am applying for your Customer Support Coordinator position. My recent work has involved organizing service requests and helping customers understand the next step.
During busy periods, I recorded unresolved requests, checked information with the operations team and made sure customers received a clear update. That experience relates directly to the follow-through described in your posting.
I would welcome the opportunity to discuss how I could support your team. Thank you for considering my application.”
Replace the general parts
Add the actual employer, position and experience. If your letter could be sent unchanged to a completely different company, make the connection more precise. Avoid claiming to know a company’s culture unless you have a reliable basis.
When no recipient is named, a professional greeting to the hiring team is sufficient. Do not invent a manager’s name. Check that the attached résumé and letter refer to the same job.
Final check
Read the letter aloud and remove anything you would not say in a professional conversation. The goal is a credible introduction, not a promise that you are the perfect candidate.