Useful thing to add to the forum is Google Analytics. 

<!-- Google tag (gtag.js) -->
<script async src=" You must log in to view this link </script>
<script>
  window.dataLayer = window.dataLayer || [];
  function gtag(){dataLayer.push(arguments);}
  gtag('js', new Date());

  gtag('config', 'G-XXXXXXXXXX');
</script>

And then set G-XXXXXXXXXX via Admin panel.