I love that Google is so absolutely trash now that when you Google "What is a meta for?" it just assumes you're a moron and refuses to even consider the possibility of throwing up a blog of dad jokes that includes that exact line.
This joke exists, Google, I know it does. You will not be spared.
Edit: DDG got me
What's a meta for?
Nothin! What's a meta for you?
This is apparently a Christian joke that I do not understand, that or a meta joke about another set up about "What is a meta," but DDG found it, dammit.