In the tabernacle, God for the first time dwells in the midst of His people. This was only a foreshadow of the coming of Christ, the kingdom of God, and the new heavens and the new earth.
Divine providence is put on display in this section of Genesis demonstrating the masterful work of God to continue to uphold His promise to send the seed as the Savior of the world.
Genesis 24-36 demonstrates the faithfulness of God in the continuity of His covenant with Abraham that endures to the generations after him. Furthermore, we see the grace of God which is the sole basis for divine election.
Genesis 12-23 presents not merely the story of Abraham, but the story of faith, sin and the promise of God. The promise of God was no mere personal promise to Abraham. It was the promise to bless the entire world through his ultimate seed, the Lord Jesus Christ, who descends from him.