Questions about Stack Exchange in general belong at Meta Stack Exchange. Questions about a specific Stack Exchange site belong on that site's Meta.
Stack Exchange is a family of Q&A sites that aims to be a repository of knowledge on a large number of topics. Web Applications (this site) is a member of the Stack Exchange network. The original (and still largest, by a wide margin) site in the network is Stack Overflow.
Each site in the network has a "Meta" site which is for discussion of the site itself, as well as getting support for site issues and features. All meta sites begin with
meta. in their URL. Examples: meta.stackoverflow, meta.superuser.com, meta.android.stackexchange.com, meta.webapps.stackexchange.com, etc.
Questions about a specific Stack Exchange site should be directed to the corresponding meta site. Questions about the Stack Exchange software or network in general, should be asked at the "Uber Meta", Meta Stack Exchange.