title: Is the HTTP 'HEAD' verb useful in web development?
body: <p>I've read the <a href="http://www.w3.org/Protocols/rfc2616/rfc2616-sec9.html" rel="noreferrer">w3.org spec on the 'HEAD' verb</a>, and I guess I'm missing something.  I can't see how it would be useful.  </p>
  
  <p><strong>Is the HTTP 'HEAD' verb useful in web development?</strong>  </p>
  
  <p>If so, how?</p>