What chain is BGB on?

Could you please elaborate on the question, "What chain is BGB on?" I'm particularly interested in understanding which blockchain network BGB is currently operating on. Is it Ethereum, Binance Smart Chain, or perhaps a different blockchain entirely? Could you also provide some insight into why BGB chose this specific chain for its operations? Additionally, is there any significance or advantage associated with being on this particular chain? Your insights would greatly assist me in understanding the technical and strategic aspects of BGB's blockchain integration. Thank you for your time and assistance.