What is the fee rate for Uniswap V3?

Excuse me, I'm a bit new to the world of cryptocurrency and decentralized exchanges. I've been hearing a lot about Uniswap V3 and I'm curious about its fee structure. Could you please explain to me what the fee rate is for Uniswap V3? Is it a flat fee, a percentage of the trade, or something else entirely? And how does it compare to other decentralized exchanges out there? I'm trying to make an informed decision on which platform to use for my trades, so any information you can provide would be greatly appreciated.