Here is an excerpt on the topic from my book ‘You’re Hired! Job Search Strategies That Work’:
The ‘Old School’ way of completing this section would be to list all of your skills to showcase how experienced you were under each job listing.
Here is yet another example of how times have changed.
The purpose of this section is to highlight your top three to five qualifications to a potential employer, from each previous job position.
Your content needs to be crafted so that it features you as a solution to the Employer’s problem.
If you include this section and you should… use a bullet format and highlight only the skills and/or qualifications that are relevant to the position you are applying for.
And substantiate with a brief explanation of the experience(s) that helped you build that skill or quality.
Career experts recommend that you customize your resumé for each job, especially at the beginning of your resumé.
General or generic resumes do not work in today’s labour market.
Employers value the skills that you have developed, regardless of where you developed them.
This includes skills developed in school, volunteering, extra-curricular activities and in paid employment. Since many employers use past performances to determine whether a candidate will be successful on the job or not; emphasize what you can offer potential employers (or bring to the table) drawing upon your collective experiences, skills, accomplishments, training/education and capabilities.
Validate all relevant successes and contributions made to past employers using numbers, dollars or percentages wherever possible.
Link your experience, skills and abilities to the competency requirements of the job you are applying for using examples of past successes on the job; this will enable the recruiter or hiring manager to visualize you performing the same or a similar role successfully for their organization.
Whatever you add to your resume, should resonate with what you have posted in your Linkedin profile.
As originally answered on Quora.com