Google

Analytics.js

Tracking Script: Replace UA ID with clients Analytics account ID – Placed inside <head>

<!-- Google Analytics -->
<script>
(function(i,s,o,g,r,a,m){i['GoogleAnalyticsObject']=r;i[r]=i[r]||function(){
(i[r].q=i[r].q||[]).push(arguments)},i[r].l=1*new Date();a=s.createElement(o),
m=s.getElementsByTagName(o)[0];a.async=1;a.src=g;m.parentNode.insertBefore(a,m)
})(window,document,'script','https://www.google-analytics.com/analytics.js','ga');
ga('create', 'UA-XXXXX-Y', 'auto');
ga('send', 'pageview');
</script>
<!-- End Google Analytics -->

Event Tracking: Further Documentation

ga('send','event','category','action');

Example Event: This will regex any click events on tel: links

<script>
    jQuery('a[href*="tel:"]').on('click',  function(){
        ga('send','event','phone-number','click');
    });
</script>