Does Uniswap have no gas fee?

Excuse me, but I'm a bit confused about Uniswap's gas fees. I've heard some people say that Uniswap doesn't have any gas fees, but I'm not sure if that's accurate. Could you please clarify for me if Uniswap truly has no gas fees, or if there's some misunderstanding here? As a professional in the cryptocurrency and finance field, I'd appreciate your insights on this matter.