These are both optional unless a specific job posting indicates it is required. As a general rule, send a one-page cover letter every time you submit a resume.Customize the cover letter for each specific job for which you applying. Use professional field-tested resume templates that follow the exact "resume rules" employers look for. Easy to use and done within minutes! Explain your past positions, experiences, and skill set. But, be careful because the second paragraph should not be a reiteration of what is on your resume. Cover letters should be tailored to each individual employer and reflect your interest in the organization or position advertised. Filling out an application is often an important step in the job search process. It can be an online or paper form requiring information about your career.