A computer reads it before a person does
Many companies use an ATS as a first-pass filter whenever a role attracts a large number of applicants. No matter how strong your actual experience is, a resume formatted in a way the ATS can't parse correctly may get filtered out before it ever reaches a recruiter's eyes.
Curious about resume writing overall?
If you want a full walkthrough of writing both a resume and a cover letter, the complete job application guide is worth checking out too.
Frequently Asked Questions
Are heavily designed resumes at a disadvantage with an ATS?
Yes β resumes packed with tables, images, and other graphic elements run a real risk of the ATS failing to extract the text correctly, so if you know the company you're applying to uses an ATS, simpler formatting is the safer bet.
What happens if I stuff my resume with too many keywords?
Unnaturally repeating keywords just to game the system tends to read awkwardly to an actual human reviewer, so it's better to weave keywords in naturally, tied to real experience, rather than forcing them in.