Liberal and progressive morality

I saw that the Honorable Rabbi objected to Shalom Tzadik’s claim that he supports progressive morality and that your support is specifically for liberal morality. I would like to know, please, what is the definition of these two moral systems? What is the difference between these types of morality and your system? And what, for example, would be desirable according to progressive morality but not liberal morality?
Thank you, thank you.