On one hand, this site is the meta site for "stack overflow."
On the other hand, this site seems to be the meta site for the rest of SE, or at least the other SE meta sites. I joined this site in the latter capacity when one of my questions on another meta site was redirected here.
At the very least, this site seems to be a meta site for other things than "stack overflow."
Is my observation correct, and if so, how and why did this come about.