Is SushiSwap on Ethereum network?

Excuse me, could you please clarify for me if SushiSwap is indeed hosted on the Ethereum network? I've been hearing a lot about decentralized exchanges lately and SushiSwap seems to be quite popular. However, I'm not entirely sure about the underlying blockchain platform it's built on. Could you perhaps elaborate on this, perhaps explaining why the Ethereum network was chosen as its foundation, if that's indeed the case? Thank you for your time and assistance.