Where do these resumes in the ATS come from? Sourcing tends to use searches or keywords, which “filter” by not selecting in the first place. Applicant tracker

Where do these resumes in the ATS come from? Sourcing tends to use searches or keywords, which “filter” by not selecting in the first place. Applicant trackers tend to be a few steps downstream of that, so wouldn’t need to filter. Based on experience at firms with on the order of 1:1 applicants to hires up to 10,000:1 applicants to hires, I’d agree most such tools are not present at most companies, as they tend to be used from ratios of 100:1 and up. On the other hand, while most companies might not have or use such tools, the more jobs a company has, the more likely they are to have some form of selection or filtering in the pipeline.