A cover letter is typically submitted with your resume when you apply for a job. It is a formal letter to the potential employer that highlights why you are a good candidate for the position, relevant skills, and what you will bring to the job if you are hired. They are usually three or four paragraphs long, and follow the format of a formal (business) letter.
Your contact information and the employer's contact information should be in the top left corner of your cover letter.
City, State Zip Code
Hiring Manager's Name
Never put, "To Whom It May Concern." Find the hiring manager's name - you may have to call the company - and address the letter directly to them.
If you absolutely cannot find the name, put a general title.
Specify what position you are applying for at the beginning of your cover letter.
If a mutual contact recommended you to the position, mention his/her name in this paragraph.
Include a brief summary of why you are qualified.
Mention specifically how these qualifications make you a good fit for the position.
You are not restating your resume, you are interpreting it. Providing specific details and relating them to the job posting, especially the description of job qualifications or duties, demonstrates that you have done your research and are well-suited to the position.
Thank them and close on an expectant note.
Close with a professional ending, such as