The code is a a java script I would like to place in the <head> of the html in a marketo landing page so I can track in google analytics.
All pages automatically? No. But if you package it as a snippet or token and add it to your templates, yes.
The GTM container code should simply be added to your LP templates. When this is done, you will be able to leverage it to roll out any tag to your LP's.
Place the GTM code in the <head> section of your template and also the <noscript> part justr after the <body> ad described in GTM installation guide.
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