Ge 47:1 Then Joseph went and told Pharaoh, and said, "My father and my brothers, their flocks and their herds and all that they possess, have come from the land of Canaan; and indeed they are in the land of Goshen."

 2 And he took five men from among his brothers and presented them to Pharaoh.

 3 Then Pharaoh said to his brothers, "What is your occupation?" And they said to Pharaoh, "Your servants are shepherds, both we and also our fathers."

 4 And they said to Pharaoh, "We have come to dwell in the land, because your servants have no pasture for their flocks, for the famine is severe in the land of Canaan. Now therefore, please let your servants dwell in the land of Goshen."

 5 Then Pharaoh spoke to Joseph, saying, "Your father and your brothers have come to you.

 6 "The land of Egypt is before you. Have your father and brothers dwell in the best of the land; let them dwell in the land of Goshen. And if you know any competent men among them, then make them chief herdsmen over my livestock."

The point of these verses is to show how God, in His providence, sustained and provided for Jacob and his sons. They were given the best of the land no less. And Moses' original readers should realize that God can do that to them too. In fact, the land that they were about to possess is a land of milk and honey. 

Ge 46:28 Then he sent Judah before him to Joseph, to point out before him the way to Goshen. And they came to the land of Goshen.

29 So Joseph made ready his chariot and went up to Goshen to meet his father Israel; and he presented himself to him, and fell on his neck and wept on his neck a good while.

30 And Israel said to Joseph, "Now let me die, since I have seen your face, because you are still alive."

31 Then Joseph said to his brothers and to his father's household, "I will go up and tell Pharaoh, and say to him, 'My brothers and those of my father's house, who were in the land of Canaan, have come to me.

32 'And the men are shepherds, for their occupation has been to feed livestock; and they have brought their flocks, their herds, and all that they have.'

33 "So it shall be, when Pharaoh calls you and says, 'What is your occupation?'

34 "that you shall say, 'Your servants' occupation has been with livestock from our youth even till now, both we and also our fathers,' that you may dwell in the land of Goshen; for every shepherd is an abomination to the Egyptians."

Moses' point here in writing this to his original Israelite readers is to emphasize the separation their forefathers had with the Egyptians. Jacob and company dwelt in Goshen, a land which was situated on the border of Egypt, relatively far away from Egyptian culture and civilization.

Just as their forefathers separated from the Egyptians so should Moses' original Israelite readers keep themselves from the idolatry and pollution of Egypt, which some of the Israelites have imbibed.