commented analytics code for the universal analytics google
<!-- Google Analytics -->
<script>
/**
* Creates a temporary global ga object and loads analy tics.js.
* Paramenters o, a, and m are all used internally. They could have been declared using 'var',
* instead they are declared as parameters to save 4 bytes ('var ').
*
* @param {Window} i The global context object.
* @param {Document} s The DOM document object.
* @param {string} o Must be 'script'.
* @param {string} g URL of the analytics.js script. Inherits protocol from page.
* @param {string} r Global name of analytics object. Defaults to 'ga'.
* @param {DOMElement?} a Async script tag.
* @param {DOMElement?} m First script tag in document.
*/
(function(i, s, o, g, r, a, m){
i['GoogleAnalyticsObject'] = r; // Acts as a pointer to support renaming.
// Creates an initial ga() function. The queued commands will be executed once analytics.js loads.
i[r] = i[r] || function() {
(i[r].q = i[r].q || []).push(arguments)
},
// Sets the time (as an integer) this tag was executed. Used for timing hits.
i[r].l = 1 * new Date();
// Insert the script tag asynchronously. Inserts above current tag to prevent blocking in
// addition to using the async attribute.
a = s.createElement(o),
m = s.getElementsByTagName(o)[0];
a.async = 1;
a.src = g;
m.parentNode.insertBefore(a, m)
})(window, document, 'script', '//www.google-analytics.com/analytics.js', 'ga');
ga('create', 'UA-XXXX-Y', 'auto'); // Creates the tracker with default parameters.
ga('send', 'pageview'); // Sends a pageview hit.
</script>
<!-- End Google Analytics -->