What is your strategy to correct a WA?

I’m a new member of this site and I’d like to know how to deal with WA.

Most of the time, before submitting, I’ll try with a test dataset of my own, and when it works like I understood the question, I submit. But since the questions are, somehow, unclear (no disambiguation), and the examples are not relevant (question on arrays: example with array of size 1), it does not mean it’s correct, just that, after trying to guess what the site wants, you find a solution for what you understood.

So my question is, when you get a “Wrong Answer”, where can you find any information about what went wrong?