As the story goes, Moses flees Egypt after murdering an Egyptian and becomes a fugitive in the land of Midian (Exodus 2:15), where he marries and spends the next 40 years helping his father-in-law Jethro shepherd his flocks. Then one day Moses encounters "the God of your father, the God of Abraham, the God of Isaac, and the God of Jacob" in the burning bush. (Exodus 3:1-6).
Then God said, "…The cry of the Israelites has now come to me; I have also seen how the Egyptians oppress them. So come, I will send you to Pharaoh to bring my people, the Israelites, out of Egypt." (Exodus 3:7-10).
But Moses said to God, "If I come to the Israelites and say to them, "The God of your ancestors has sent me to you,' and they ask me, "What is his name?' what shall I say to them?"
God answered Moses, "I am who I am." God said further, "Thus you shall say to the Israelites, "I am has sent me to you.' " (Exodus 3:13-14).
Having thus successfully negotiated with God by extracting the revelation of God’s name, Moses goes boldly before Pharaoh, with this credential in hand, in company with the elders of Israel, and secures the release of God’s people through many signs and wonders.