There is software out there for optimizing resumes to ATS. It basically is keyword matching. One tool will allow you to paste the Job Description and your Resum

There is software out there for optimizing resumes to ATS. It basically is keyword matching. One tool will allow you to paste the Job Description and your Resume. You can give it a URL, and they'll detect ATS type, and give you further recommendations for file formats and things. In any case, it's like an arm race for SEO. What was once a useful measure will lose meaning as everyone adopts these tools.