We did have Checklist for the perfect post, but that's about questions.
Then Should we have a “How to write the perfect answer?” discussion? was asked, but never got any significant amount of attention (at least visibly on Meta).
This post is an attempt to be the latter.
We get lots of new users who come here and clearly want to contribute by answering questions. However, being new, they aren't familiar with our standards, and often not with the Stack Exchange question and answers format at all. The result is very often that a newcomer posts an answer, and it gets voted down and deleted. In the best of cases, they get a few helpful comments and are encouraged to try their hands on some other question, but usually very little concrete can be offered in the very limited comment space to help them figure out what we want as opposed to what we don't want. That's not a very nice welcome.
The intent of this post is to gather generally applicable helpful hints on what we want to see in answers to questions. The top several of those will then be compiled into a separate Meta post that we can point new users toward, to help them understand our site and our format better. Something like a comment such as
Welcome to Worldbuilding! Thank you for your interest in this site! Have a look at this cool post that can help you improve your answer in only a few moments with ten short and easy questions.
This is the brainstorming question. Throw your ideas for how to tell a good answer from a bad one into the mix (but make sure they are actually generally applicable across the site, or at the very least mostly so), let's stir, and see what rises and what sinks.
Use the same template as in the question checklist question:
Question: The question you want to propose
Should be answered: Yes or No
Further explanation on why this question is useful + examples. This part will be added as footnote in the final checklist post.
I encourage everyone to write the questions in such a way that a "good" answer naturally leads to the proposed question being answered with a "yes".