God said to Moses, “I AM WHO I AM.” And he said, “Say this to the people of Israel,
‘I AM has sent me to you.’”
(Exodus 3:14 ESV)
The Jewish people have just spent the last 400 years in Egypt, and for the most of that time they were slaves. Moses is given a hefty task of bringing the people out of Egypt. Moses had grown up in the Pharao's palace since he was adopted by the daughter of Pharaoh. After spending forty years in the desert God calls him to free his people.
Moses must have had the best education and knew much of the world, but it is not surprising that he would not know much about God at this point. So, it's not surprising that Moses would ask for God's name so he can tell the people who he was serving. Moses was not serving one of the many gods of Egypt. No, Moses was being sent by the great I Am!
God wanted Moses to know that He is, that is self-existent. He has always been and always will be. God, and he is there for Moses and able to help him complete the task God has for him.
How does knowing that God is the great I Am help you today? Are you struggling with a task that seems to big for you? Will you seek the presence of God as the great I am to give you strength to serve him?