Stack Exchange sites with MathJax enabled have a section in the editing help page on how to use LaTeX. This section contains a "MathJax help" link at the end.
By default, this "MathJax Help" link points to this URL, but it turns out that the Community Team can change it to a different page, such as a post on our site's meta with a customized explanation of MathJax or, for instance, Math Stack Exchange's comprehensive meta post.
We wanted to start a discussion in case folks feel strongly about changing the link. If you have an idea, please post it as an answer below, and if there's a consensus, we can let the Community Team know.