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BookingCenter requires that an MSO 'Premium Marketing contract' is in place in order for this to work. Go to: http://www.BookingCenter.com/contact.html to request the service or call us at +1-707-874-3922 ext 201.
KEY NOTES:
https://support.google.com/analytics/answer/10089681
Install your Google tag
You can use a website builder to finish setup automatically, or install your tag manually. To ensure you get accurate measurement, make sure your tag is installed on every page of your site.
Install the Google tag manually
<!-- Google tag (gtag.js) -->
<script async src="https://www.googletagmanager.com/gtag/js?id=G-XXXXXXXX"></script>
<script> window.dataLayer = window.dataLayer || [];
function gtag(){dataLayer.push(arguments);}
gtag('js', new Date());
gtag('config', ' G-XXXXXXXX ');
</script>