When we think about candidate sources, we often think about recruitment, but applicants can also indicate their source by answering, “How did you hear about his role” on their application.
To include this question in your job post, ensure that this field is visible by going to the “Application Form Fields” section and enabling it.
Jobs → Jobs and Analysis → Edit Jobs Form
To manage the options available to applicants, you can manage External Sources at the organizational level.
Organization → External Sources