WTF? I hear you ask. That was my response as well. I saw this job title on the CV of someone I was interviewing for an admin position.
Business owner, when you need a customer expectation manager it is time to take a step back and re-evaluate, because you are doing it wrong. Make a clear promise to your customer and find a way to deliver more. It is as simple as that. It should be.
This is about being the good guy, but it is also about making more money. When your customers receive more than they were promised you earn trust, which on the Net translates into reputation, which translates into sales.