What network does KuCoin use?

I'm curious, could you please clarify for me which blockchain network does KuCoin utilize for its operations? I understand that it's an important aspect of cryptocurrency exchanges, and I'd like to have a better understanding of the infrastructure behind it. Additionally, is there any specific reason why KuCoin chose that particular network, or are there any benefits that it offers over other available options? Thank you for your time and assistance.