What does 1 Kings 16:31 mean?

It wasn’t enough for Ahab to follow Jeroboam’s example—he went even further. He married Jezebel, daughter of Ethbaal, king of the Sidonians, and started worshiping Baal. 1 Kings 16:31 - Modern Text Bible

(Ahab’s marriage to Jezebel brings foreign influence and Baal worship into Israel, making things even worse spiritually.)