When you send out a resume, you should include a cover letter. A cover letter is either a formal letter or a formal e-mail that is sent to an employer in order to introduce and highlight your resume. Cover letters provide an introduction to you and your resume and create a first impression for employers. They identify the position you are seeking, connect your skills and talents to the position, and can be a place where you demonstrate why you are the ideal candidate or why you are uniquely qualified for the job. Use it also as an opportunity to showcase your knowledge about the organization for which you are applying.