The detail of king Asa’s reforms. The God given victory of the last chapter inspires him to carry on in thanks, and a prophet reminds him of the zero tolerance of foreign religions.
The people him him in celebrating the sacrifices to Jehovah, and stamp out idolatry, even his own grandmother changes.
He has peace for the rest of his reign, and many believing northern Israelites come and move to the South.
I react a bit cynically, because it’s just a staging point in a downward path for Israel. But I’m looking too much at the big picture.
It’s a godly life and a godly time. That’s a good thing, even if, as currently, you can see an overall pattern of decline.