Google Tag Manager allows Google to manage the marketing tags used on your website. Common uses of tags include providing visitor statistics and tracking the success of your online advertising. To use Google Tag Manager you need to set up the Google Tag Manager container snippet on your website.
Adding tags directly
Many popular marketing tags can be added directly to your site without needing Google Tag Manager — you can find these in the menu in the settings panel. Adding the tags directly improves your site’s performance, and ensures your cookie and privacy policies are automatically updated to comply with data protection laws.
The container snippet
The Google Tag Manager container snippet looks like this:
<!-- Google Tag Manager -->
<script>(function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':
new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],
j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src=
'https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);
})(window,document,'script','dataLayer','GTM-ABCDEFG');</script>
<!-- End Google Tag Manager -->
<!-- Google Tag Manager (noscript) -->
<noscript><iframe src="https://www.googletagmanager.com/ns.html?id=GTM-ABCDEFG"
height="0" width="0" style="display:none;visibility:hidden"></iframe></noscript>
<!-- End Google Tag Manager (noscript) -->
In two places there is some text starting GTM- followed by letters and numbers (highlighted in blue in the example above): this is your Tag Manager ID.
Adding the container snippet to your site
Open the settings panel and click Google Tag Manager in the menu on the left. Enter your Tag Manager ID in the field and click Add.
If you later need to remove the container snippet, click the Remove button.
