Yep. That was a rather poor way to handle your question. It drives me crazy when customer service reps don't actually answer my questions as well.
I'm not an expert with DNA, but I happen to know a geneticist whom I asked about things like this. If I remember correctly, DNA can be traced through a male line (your father, his father, his father, etc.) or through a female line (your mother, her mother, her mother, etc.). Ultimately, you'll find out countries where your ancestors came from (sometimes actual regions as well). But it's only going to be able to follow two branches of your tree, so it doesn't really give a whole picture. For some people, the DNA test is really helpful. But for others it's a complete waste of time.