An optional part of your resume but one that is growing in use -- especially with scannable (text-based) resumes. This section should summarize (using nouns as keywords and descriptors) your major career accomplishments. Sometimes also referred to as "Summary of Accomplishments" "Qualifications Summary" or simply "Accomplishments."
Nouns and noun phrases that relate to the skills and experience that employers use to recall resumes scanned into a database. Keywords can be precise "hard" skills -- job-specific/profession-specific/industry-specific skills technological terms and descriptions of technical expertise job titles certifications names of products and services industry buzzwords etc.