HTML - Google Analytics.

google-analytics.html

<!-- Google Analytics: change UA-XXXXX-X to be your site's ID. -->
<script>
	(function(b,o,i,l,e,r){b.GoogleAnalyticsObject=l;b[l]||(b[l]=
	function(){(b[l].q=b[l].q||[]).push(arguments)});b[l].l=+new Date;
	e=o.createElement(i);r=o.getElementsByTagName(i)[0];
	e.src='//www.google-analytics.com/analytics.js';
	r.parentNode.insertBefore(e,r)}(window,document,'script','ga'));
	ga('create','UA-XXXXX-X');ga('send','pageview');
</script>