What is dexe in Binance?

Could you please explain what exactly is "dexe" in the context of Binance? I've heard people discussing it but I'm not quite sure what its purpose or function is within the Binance platform. Could you elaborate on its features, how it works, and why it might be significant for crypto traders and investors? Additionally, is it available for trading on the Binance exchange, and if so, what are the associated trading pairs and any relevant fees? Thank you for clarifying this matter for me.