What does Genesis 46:34 mean?

So, when Pharaoh asks, just say, "We've taken care of animals all our lives, just like our ancestors." That way, you'll be able to stay in Goshen, since Egyptians want nothing to do with shepherds.' Genesis 46:34 - Modern Text Bible

(Joseph repeats his advice, making sure his family understands that their occupation will actually help them stay separate in Goshen.)