This question already has an answer here:
This might seem stupid, but what actually the meta site does? The chat site is for general discussions that might be off-topic. But what is meta site used for?
So that next time when I ask a question, it's for sure that I am asking a questions that's related to the site.
Edit: I wasn't able to edit this, so here it goes. The answer I got was "The meta is a subdomain for a website which is entirely dedicated to the site itself!".