The "ATS optimization" advice on the internet is mostly outdated. Most modern ATS systems (Greenhouse, Lever, Ashby, Workable, the ones tech actually uses) parse PDFs well, handle tables fine, and don't reject resumes for cosmetic reasons.
What actually matters in 2026: Keyword match to the job description. This is real and verifiable. Most ATS systems show recruiters a "match score." Resumes that mirror the JD's specific terminology (not just synonyms) score higher and get prioritized in the recruiter's queue. Spend 5 min per application customizing 3-5 keywords. Clear section headers (Experience, Education, Skills). Helps the ATS classify content correctly. "Career Journey" instead of "Experience" sometimes confuses parsers. Standard date formats. "MM/YYYY" or "Mon YYYY": both fine. "Spring 2024" and "Q3 2023" sometimes don't parse. Searchable text, not images. If your name or contact info is in an image, the ATS can't find you. Pretty visual resumes that put header text in images are the biggest unforced error. One file format: PDF. Don't send .doc, .docx, .pages. PDF parses most consistently.
What does NOT matter (despite what internet advice says): Two-column layouts (modern ATS handles them fine) Use of color (recruiters look at color-printed resumes all day; it doesn't trigger ATS rejection) "Keyword stuffing": modern parsers detect this and it hurts more than it helps Specific font choices (any sans-serif >9pt is fine) File name (despite the "namerole2026.pdf" advice; nobody at the company sees the file name except in their downloads folder)
The high-leverage move: spend 5 minutes per application matching keywords from the JD. That's the entire ATS-optimization game in 2026.