What did Moses ask of God in his first meeting with Him when He called him to serve?

When God called Moses to be the first leader of God's people in the Old Testament, Moses asked of Him to know his name. God revealed His name to him as a representative of the people, and that name announced to him that his name is “Jehovah,” which means, “I AM.” What does the expression “I AM” mean? It means that He exists, working on behalf of his chosen people, unlike the Greek religions, which often looked to God’s existence as being far above the affairs of the world.