Recruiters don't read every resume in a pipeline of 400 applicants line by line. They search their ATS by keyword — a job title, a tool, a certification — and read the results the search returns. If your resume doesn't contain the terms a recruiter is likely to search for, it may never surface at all, regardless of how qualified you actually are.
Where the real keywords come from
The single best source of keywords isn't a generic list — it's the job posting itself. Requirements and preferred-qualifications sections are written by the hiring manager and often copied close to verbatim into the ATS search recruiters run. Read the posting for the specific tools, methodologies, certifications, and soft-skill phrases it repeats, and treat those as your priority list.
- Exact tool and platform names (e.g. "Salesforce", "Figma", "Terraform") — abbreviations and full names both, since either might be searched.
- The job title itself, or a close variant, somewhere in your experience section.
- Certifications and degrees written the same way the posting writes them.
- Methodology and process terms ("Agile", "root cause analysis", "P&L ownership").
- Soft-skill phrases that appear more than once in the posting — repetition signals what the hiring manager actually cares about.
Natural placement beats keyword stuffing
A resume that lists twenty tools in a skills block but never mentions them in context reads as padding to a human reviewer, even if it technically boosts a keyword match score. Better results come from weaving the same terms into your bullet points where they were genuinely part of the work: "Migrated the reporting pipeline to Terraform, cutting deploy time by 40%" does more for you than a bare skills list, because it satisfies both the ATS search and the recruiter reading the results.
It's worth tailoring this per application rather than keeping one static resume. A term that's central to one posting might be irrelevant to the next, and a resume tuned for a generic version of your role will underperform against one tuned for the specific listing in front of a recruiter.