They can be job seekers' ticket to land a job. It will dramatically increase their chances of getting interviewed. With the correct format, their efforts will eventually pay off once they have opted for a job interview. However, one of the biggest mistakes of creating one is that people tend to copy on the Internet. Some of them are looking into others' letters on the Internet and make it their own. With a little bit of editing, they can be able to pass it. Companies nowadays are aware of that scheme, so people should take effort in deciding whether they will copy on the Internet or they will create their own, unique and compelling letter.
In reality, there are just some people who have developed this mania over grabbing hold of the most unique cover letter format they can find. They think that they will need all the research that can ensure their application letter achieves a desirable look. They feel that if it is not attractive or interesting enough, their cover letter format will end up being thrown in the trash bin.