ATS stands for "Applicant Tracking System" and is a software tool used by organizations to manage their recruitment and hiring processes.
A single job opening gets around 2500 applications and it is inefficient for a recruiter to go through them individually. This is where ATS comes in. ATS will discard 2480 of those applicants and only forward 20 resumes that it can read and thinks are better aligned for the job to the recruiter.
The ATS is a powerful tool that can make or break your chances of landing a job. Make sure you understand how it works and optimize your application accordingly, or you may be left in the digital dust.