Definition: A skill set is a particular category of skills necessary to acquire a job. Examples of specific skill sets include human relations, research and planning, leadership and management, and computer skills.
Job listings often include a list of skill sets that applicants require. In your resume and cover letter, include skill sets that apply to the job listing.
For example, if a position requires an applicant with strong computer skills, include a list of the software programs you are familiar with.

