What is Coinbase advanced?

Could you elaborate on what Coinbase Advanced entails for cryptocurrency enthusiasts and traders? Is it a separate platform or a feature upgrade? Does it offer more advanced trading options and analytical tools? What sets it apart from the standard Coinbase experience? Additionally, what kind of traders would typically benefit from utilizing Coinbase Advanced? And, does it require a separate account setup or is it accessible through existing Coinbase accounts? Finally, is there a fee associated with accessing or using Coinbase Advanced?