Applicant tracking system

An applicant tracking system, or ATS, is where your hiring lives. Applications come in there, recruiters screen and move candidates through stages (new, contacted, interview, offer, hired), and hiring managers leave their notes. Most ATS tools also post your jobs to your careers page and job boards, and many add the structured data Google needs.

For recruitment marketing, the ATS matters in two ways. First, it often decides what your apply flow looks like, and some of the worst forms I see are just the default settings: create an account, upload a CV, then retype it all. Check what you can switch off. Second, it's where the data that actually matters lives. Your ad platform knows clicks and applications, but only your ATS knows who was qualified and who got hired. Connecting the two is how you get from cost per applicant to cost per qualified applicant and cost per hire.

One more thing: "ATS-friendly CV" advice is everywhere. In reality it's mostly about how parsing and keyword searching work in a specific system, so don't assume every ATS rejects people automatically.

Example

A company advertises on Meta and judges campaigns on cost per applicant. When they add UTM tags to their ad links and make sure the source gets saved in their ATS, they can see which campaign each hire came from. One campaign with expensive applicants turns out to bring in most of the people they actually hired.