Notes on tracking, from inside the container.

Guides on Google Tag Manager, server-side tagging, Consent Mode and GA4, written by the two people who set these up for clients every week. Some are fixes we keep repeating, some are the longer explanations we wish we could send instead of a call.

Written by Jerry and Angelica. Prefer video? The same topics on YouTube.

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The four we send most often

01How to track website data without violating user privacy in 2026Where the line is between useful measurement and a fine, and how consent-native tracking sits on the right side of it. 02Why Google Consent Mode v2 is no longer optionalWhat changes for EEA and UK advertisers, and what a correct advanced implementation looks like. 03Fix "Failed" or "Still Running" tags in GTMThe four causes, in the order we check them: ad blockers, consent timing, triggers and the request itself. 04Google Tag Gateway and CloudflareWhat the first-party gateway does, what it doesn't, and when it's worth putting in front of your tags.

Everything else is below, newest first.Browse all posts

Notes on tracking, from inside the container.

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What Data Can You Legally Send When Consent Is Denied?

UTM Parameters to First-Party Cookies: How to Stop Losing Attribution Data

Server-Side Tagging vs Tracking: Know The Difference

Client-Side vs Server-Side Tracking: What You Might Get Wrong