This verse lists the descendants of Seir the Horite, who inhabited the land of Edom before the Israelites. It serves as a historical record of the genealogy of the Edomites, tracing their lineage back to Seir. By including this information, the verse highlights the interconnectedness of various nations and peoples in the Old Testament, showing God's sovereignty over all of humanity's history. While it may seem like a simple genealogical record, it underscores the importance of understanding the context and background of different nations mentioned in the Bible.