Eligibility Profile- "People Manager"

Summary:

When setting up an Eligibility Profile, under the "Employment" criteria tab, there's an option to define criteria by "People Manager" and the value options are YES or NO. How would a person have a value of "YES" here?

Content (required):

When setting up an Eligibility Profile, under the "Employment" criteria tab, there's an option to define a population by "People Manager" and the value options are YES or NO. How would a person have a value of "YES" here? Is the system looking at a specific field or formula to determine this value? I initially thought that the system would be pulling from the "Working as a Manager" field on the Employment page, but that doesn't seem to be the case. Thank you in advance.