What's new in Uniswap v3?

So, what's the buzz around Uniswap v3? I've heard it's got some exciting upgrades. Can you tell me more about the new features and how they're going to improve the user experience? Are there any changes to the way liquidity providers can earn rewards, or the way traders can interact with the platform? And what about the capital efficiency - how does it compare to previous versions? I'm eager to learn more about what makes Uniswap v3 stand out in the world of decentralized finance.