What Is an Applicant Tracking System?
An Applicant Tracking System (ATS) is software used by employers and recruiters to manage job applications. When you submit a resume online, it often goes directly into an ATS before any human reviews it. The system scans your resume for keywords, formatting compatibility, and relevant information to determine whether you're a match for the role.
If your resume isn't ATS-friendly, it may be filtered out — even if you're highly qualified. Understanding how these systems work gives you a significant edge.
How ATS Systems Evaluate Resumes
ATS tools primarily look for:
- Keywords: Terms that match the job description — job titles, skills, tools, certifications, and industry-specific language.
- Formatting compatibility: Whether the system can accurately parse (read) your resume's text and structure.
- Relevance signals: How closely your experience, education, and skills align with the role requirements.
ATS-Friendly Formatting Rules
Many well-designed resumes with columns, graphics, headers in text boxes, or tables actually fail in ATS systems because the software can't read them correctly. Follow these formatting guidelines:
- Use a single-column layout. Multi-column formats confuse many ATS parsers.
- Avoid text boxes, headers/footers, and graphics. Content in these areas is often skipped entirely.
- Use standard section headings. "Work Experience," "Education," and "Skills" are universally recognized. Creative headings like "My Journey" may not be.
- Stick to common fonts. Arial, Calibri, Times New Roman, and Helvetica are safe choices.
- Use standard bullet points (•) rather than decorative symbols.
- Submit as a .docx or PDF. Most modern ATS systems handle both, but check job postings for preferences. If unsure, .docx is the safer choice for ATS compatibility.
Keyword Optimization: The Most Important Step
Keywords are how ATS systems match your resume to a job posting. The best source of keywords is the job description itself. Here's a process for doing this effectively:
- Copy the job description into a document.
- Highlight every skill, tool, qualification, and job title mentioned.
- Cross-reference those keywords against your own resume.
- Where you legitimately have that skill or experience, ensure the exact phrasing appears in your resume.
For example, if a job description says "proficient in Salesforce CRM," don't just write "CRM experience" — use the exact term "Salesforce" in your resume.
Where to Place Keywords
Strategically place keywords throughout your resume in natural, readable ways:
- Professional Summary: Include 3–5 core keywords that define your expertise.
- Skills Section: List specific tools, technologies, methodologies, and competencies.
- Work Experience: Weave relevant keywords into your accomplishment bullet points.
- Education & Certifications: Name certifications exactly as they appear (e.g., "PMP – Project Management Professional").
What to Avoid: ATS Red Flags
| Avoid This | Do This Instead |
|---|---|
| Tables for layout | Use plain text with line breaks |
| Images or logos | Text-only content throughout |
| Creative fonts | Standard professional fonts |
| Headers/footers with key info | Keep all info in the main body |
| Abbreviations only (e.g., "PM") | Spell out and abbreviate: "Project Manager (PM)" |
| Generic job titles | Mirror the exact job title from the posting |
Test Your Resume Before Submitting
There are free online tools that let you test how well your resume matches a specific job description — tools like Jobscan or Resume Worded can show you your keyword match rate and flag formatting issues. Even a quick self-check — pasting your resume text into a plain-text editor to see what an ATS might "see" — can reveal hidden formatting problems.
ATS Is the Gatekeeper, Not the Decision Maker
It's important to remember: the goal of ATS optimization is to get your resume in front of a human. Once it does, your content, accomplishments, and presentation take over. An ATS-optimized resume that lacks substance won't get you far — but a beautifully written resume that never gets read is equally useless. Aim for both.