Exodus 1:2 serves as an introduction to the book of Exodus by listing the names of Jacob's sons who came to Egypt with him. This verse sets the stage for the narrative of the Israelites' journey from slavery to freedom under the leadership of Moses. It highlights the fulfillment of God's promise to Abraham that his descendants would become a great nation. The mention of Jacob's sons also emphasizes the continuity of God's covenant with the Israelites despite their time in Egypt.