From Longman Dictionary of Contemporary Englishthat’s betterthat’s betterspoken used to say that something has improved, that you are happier or more comfortable, or to encourage someone Ah, that’s better. I needed to sit down. ‘Can you turn it down?’ ‘Is that better?’ → better
Examples from the Corpus
that’s better• Try keeping your arm straight when you hit the ball. That's better!• She had half drained her mug when she said, ` Ah, that's better!• Come on, give me a hug. There, that's better, isn't it?• Surely that's better than fading away in a hospital bed somewhere?• Well, that's better than finding half a worm!• But that's better than none.• So let's try: That's better. the pages now contain both words.• That's better, the waist is accentuated now. 