Cover letters must have correct grammar, proper spelling, good sentence structure and must comply with standard business format. Your cover letter is the first sample of your writing skills. It is ...

Cover letters are similar in purpose to resumes ... handwritten note, or typed and sent as a business letter. Whatever format you choose, send it within 24–48 hours after the interview, if possible.

Most online job applications require a cover letter. Because employers don't get an opportunity to meet you, the cover letter becomes a written substitute for a face-to-face meeting. "The purpose of a ...