Before you start writing or editing your resume and cover letter, you need to do some research on the role and sector you are applying for. You need to understand the main duties, responsibilities, and requirements of the job, as well as the values, culture, and goals of the organization. You can use the job description, the company website, social media, industry publications, and networking contacts to gather information. This will help you identify the keywords, skills, achievements, and tone that you should use in your resume and cover letter.