Why You Need to Write a Cover Letter
A well-written cover letter gives you a chance to sell yourself to the employer in a narrative format, and explain why you are the ideal candidate. That's why you definitely should write one.
You will make it clear that you are highly interested in the job, and that you want the job enough to take the time to write a cover letter.
Long letters carry a considerable risk of getting just a glance, but no hiring manager minds reading a brief half-page story – especially when the same candidate has written the targeted resume well.
A cover letter is your opportunity to explain how you solve problems. It helps to show your personality and reinforce your professional image. Finally, a cover letter advertises your strengths and convinces an employer that you can be of benefit to the company.
Every resume should have a convincing companion. That's your cover letter - a story behind your resume's key points.