A cover letter acts as an attractive envelope for your CV, and it points out to the employer why they should go ahead and read your CV. Your CV gives out the details about your qualifications, educational backgrounds, the jobs that you have done, their duration, the roles you played, and all the other details. A cover letter, on the other hand, places emphasis on what exactly you will bring to the organization if you are hired and why you should be considered in between all the candidates who have applied for the same job.