Genesis 36 is a genealogical chapter that records the descendants of Esau, the twin brother of Jacob. It begins with a list of Esau's sons and grandsons, and then moves on to a list of the chiefs of Edom, which was the land that Esau's descendants settled in. This chapter is important because it shows the fulfillment of God's promise to make Esau a great nation, despite the fact that Jacob had been chosen to receive the blessing of the firstborn.
The chapter also serves as a reminder of the importance of family and lineage. It shows how the descendants of Esau were able to establish a powerful nation, despite the fact that they were not the chosen people of God. This is a reminder that God's promises are not limited to those who are chosen, but are available to all who seek Him.
Finally, this chapter serves as a reminder of the importance of faithfulness. Despite the fact that Esau had been passed over for the blessing of the firstborn, he remained faithful to God and was rewarded with a great nation. This is a reminder that God rewards those who remain faithful to Him, even when it seems like they have been overlooked.