How to set up, route and check the tags that measure your site: Google Tag Manager, Google tag gateway, consent and server-side tagging.
Google tag gateway serves your Google tag from your own domain. What it is, how it differs from server-side GTM, who it suits, the results to expect, and how to set it up and QA it.
I write about analytics measurement when I have something useful to say. One email per article, nothing else.