One of the most common questions asked of job search experts is, “Do I really need a cover letter?"
To set the record straight, yes, a cover letter is necessary. The cover letter influences the reader's first impression of you. It serves to sell you as a viable candidate or it knocks you out of the running.
Do you hate writing cover letters? Most people do.
However, employers expect to see a cover letter with your resume. They read your letter and form impressions of you as a candidate based on what they read. A bad cover letter (or a lack of one at all) can cause you to lose the chance to interview.