[Agamus]

I studied some philosophy as an undergraduate. My understanding is this:

Ethical theory tries to answer the question, 'what should we do?' (e.g. death penalty or not?)

Moral theory tries to answer the question, 'why should we do that' (e.g. 'because god says so')

Metaethical theory tries to answer the question, 'what is the 'theory of knowledge' behind that moral theory?' (e.g. 'are there moral facts at all?')