A skills resume allows you to present accomplishments from all your life experiences. In the above sample, Andrea's resume does a good job of presenting what she can do, without making it obvious that her work experience was limited to part-time and summer jobs. Nor does it say that she is a recent graduate. A well-written skills resume presents your strengths and avoids showing your weaknesses. For example, it can hide limited paid work experience, gaps in your job history, and little or no paid work experience in the field you want to get into now.
Skills resumes can also be much harder to write than a chronological resume.