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GTM and Page Speed: Why Runtime and INP Matter More Than Script Size
Updated after a LinkedIn discussion. I reworked and expanded this article based on the discussion underneath it. Thanks to everyone who jumped in. Site speed stopped being…
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GTM vs. CSP — How to Make Tracking and Security Coexist
A developer deploys Content Security Policy on the company website — and tracking silently breaks. Or the reverse: an analyst adds a tag to Google Tag Manager…
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How to Break a Website Using Google Tag Manager
Google Tag Manager runs on over 30 million websites. It’s one of the most widely used tools for managing tracking and marketing scripts. Marketers love it —…
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Is GA4 Data Accurate?
No, buddy. Let’s break it down. I’m not saying GA4 is useless. Having Google Analytics data is still better than having none. But you need to know…
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dataLayer and recursive merge
dataLayer is a simple JavaScript array. Push an object, read it in a Google Tag Manager (GTM) variable, done. Nothing complicated about that. Right. If you’re designing…
