Let's talk about where you come from. I don't mean your hometown, your country of origin or your last job; I'm talking about the source of your résumé in a company's applicant tracking system (ATS). It could mean the difference between a phone call from human resources and a "thanks, but no thanks" letter.
ATSs can store the original source of a résumé; that tells companies whether the résumé came from a specific job board, an employee or partner referral, a cold call, a networking event, etc. Based on past experience, an employer might have gotten its best hires from newspaper classifieds, online postings or employee referrals. It's in a company's best interest, and a usual practice, to try to find similar talent from those same sources...