I don't seem to understand what this is for. If you want a fast loading page, don't add slow stuff to it. What new is AMP bringing to the table? It seems to be

I don't seem to understand what this is for. If you want a fast loading page, don't add slow stuff to it. What new is AMP bringing to the table? It seems to be some kind of a framework? Is it code or is it a preprocessor or what is it?