I saw it in my profile and went to check it out but don't understand what the difference is with here. It also doesn't allow Monero tags.
It's a stackexhange thing. Every site has the corresponding meta. It's a place to talk about how the main site is moderated, what kind of questions are off-topic, tags policy etc.
meta to me just means 'data about data itself'. so monero meta is discussion about the page itself, a deeper level of participation if you will :)