title: What is the mechanism of the `ghs.google.com` domain?
body: <p>If I want to bind a domain name to my app on the <strong>GAE</strong> (Google App Engine), I should add a CNAME record to <strong><code>ghs.google.com</code></strong>.  I'd like to understand how this domain works.</p>
  
  <p>For example, I have a CNAME like this: <code>blog.goace.com</code>  →  <code>ghs.google.com</code>, and my app's URL is ace.appspot.com. When I type <a href="http://blog.goace.com" rel="nofollow noreferrer">http://blog.goace.com</a>  in my browser, what will happen before I see my Gapp on the screen?</p>