Is Polkadot on ETH network?

Could you please clarify something for me? I've been hearing a lot about Polkadot and Ethereum lately, and I'm trying to understand the relationship between them. So, my question is: Does Polkadot operate on the Ethereum network? Or is it an independent blockchain project with its own unique functionality and features? I'm a bit confused about how these two platforms interact, if they do at all. Could you help me sort this out? Thank you in advance for your assistance!