What does 2 Kings 8:26 mean?

Ahaziah was twenty-two years old when he became king, and he ruled in Jerusalem for one year. His mother was Athaliah, granddaughter of Omri, king of Israel. 2 Kings 8:26 - Modern Text Bible

(Ahaziah’s age, short reign, and family background are given. His mother’s lineage connects him to Israel’s royal family.)