Genealogies in Scripture show us that the characters and stories in the Bible are historical and they show us how God works through families and generations. This genealogy focuses on the line of Aaron as an early indication that God had chosen Aaron and his descendants for the priesthood. Hebrews 7 shows us that the Aaronic priesthood was not sufficient to truly deal with our sins and so Jesus was not of the line of Aaron but of the order of Melchizedek.
Read Exodus 6:13-27