Keyword resumes use keywords and phrases, specific to your field, throughout your resume for screening and ranking by a computer.
To be most effective, your resume should first be optimized as a keyword resume. Keywords are typically nouns that reflect skills and experience sought by a potential employer. If your resume has been selected and ranked by a computer, it will then be reviewed by a human screener; hence, it is important to balance keyword elements with traditional action verbs and other key phrases that elicit a positive response from the human reviewer.