The phrase "never been better" is a positive response when someone asks you "how are you" or "are you alright?" It indicates that you are feeling exceptionally well and that things in your life are going extremely positively. It's an optimistic and cheerful response, suggesting that you are in a great mood and possibly experiencing a high point in your life or feeling exceptionally good at that moment. It's a way of expressing that things couldn't be any better, emphasizing the positive aspects of your current state of being.