Question

why it is important to know how good research is done.

Answer 1

Thought this is not a math question, I think it's a fairly hard one to categorize...
I would just say, if you do good research you get the right answers about what you are investigating.
If you do bad research, you learn nothing, or perceive falsehoods.
Therefor do good research.
QED

Answer 2

...and of course you need to know how good research is done in order to do it, hence the answer to your question