Include the Google Analytics Tracking Code (ga.js) – HEADER
<script async src='https://www.googletagmanager.com/gtag/js?id=UA-40742215-1'></script>
<script>
window.dataLayer = window.dataLayer || [];
function gtag(){
dataLayer.push(arguments);
}
gtag('js', new Date());
gtag('config', 'UA-000000-1', { 'anonymize_ip': true });
</script>