Does an ATS actually auto-reject your resume?
Almost never. Applicant tracking systems mostly store and search — a human still does the rejecting. Here's what really happens.
It stores, it doesn't judge
An ATS is a database with a search box. It parses your resume into fields, keeps it, and lets a recruiter search and filter. The idea that it silently bins 75% of applicants is mostly a myth sold by resume-scanner tools.
Where you actually lose
You lose when the parser can't read your layout, or when a recruiter searches a term your resume never uses. Both are fixable: parse-friendly formatting, and the job's actual language reflected honestly in yours.
Search, not scoring
Recruiters search by title, skill and location far more than they trust a 'match score'. Make the true, relevant terms present and specific, and you show up in the searches that matter.
The takeaway
Write for the human who reads you second, in a format the machine can read first. That order — clean parse, real keywords, strong bullets — is the whole game.