Objectively speaking, in that arrangement, the letters used to serve as a 'cover' _ that is, or the front page, to the whole job_hunting document, which apart from incorporating the curriculum vitae or resume, typically also tended to enclose certified copies of ones academic and professional credentials. The days when the letter used to literally cover the job_hunting documents might be long gone (as we mostly send applications, Curriculum vita or resumes and copies of certificates online as email attachments), but the cover letter has still not outlived its usefulness. The letter is the document that nowadays provides introduction to the whole job application attachment, 'and where it is all coming from. 'There are a number of formats that can be employed in drafting a cover letter whenever job hunting, depending on factors like the job that is being sought and the jobseeker's preferences.
Imagine that you are the hiring manager for the company at which you are applying. You might receive a minimum of 10┰ resumes and cover letters on the first few days of posting the job. Then, on the next few days if you happen to see a follow_up cover letter from an applicant saying how impressed they are with the company and would absolutely love an interview, you probably are going to take note and look at their credentials even further. Now let's go back to setting up your follow up cover letter format: First, place a small opening paragraph at the beginning of the page expressing that you are "following up," and that you are still interested in gaining an interview. That's it! Utilizing a second cover letter will literally double your chances at gaining the interview.