Author: Pavel Šabatka
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Errors in Tracking
Czech national holiday of web analytics. Traditionally held on the first Saturday in September. Yes, MeasureCamp. I gave a lecture on measurement errors and their monitoring. I promised the participants that I would publish the slides. However, the slides were only a supplement to the presentation. Practical examples can be found in the GTM export.For…
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How to calculate the opt-in rate of cookie bars
The opt-in rate of the cookie bar shows how many consents I get. A high opt-in rate is good because it means I get a lot of consents. If we want to measure it, we need a more precise definition. Why you need to know the opt-in rate The most important reason is that I…
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GTM in violation of the GDPR
A court in Hanover, Germany, has ruled that the use of Google Tag Manager (GTM) violates the GDPR. This decision caught my attention because it does not concern a measurement or marketing platform, but GTM, which is supposed to be an “impartial trigger” for marketing codes. What exactly was the issue? And what impact will…
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Google Consent Mode v2: What It Is and How It Works
Your website has a cookie banner. A visitor clicks “Reject all”, the banner faithfully stores the choice, and you are convinced you’re done. Google Ads still reports missing consent signals. The banner did nothing wrong. It just never told the tags, the pieces of code on your site that send data to tools like Google…
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What Is Google Tag Manager and Why You Want It on Your Website
You’ve just been given access to Google Tag Manager, or someone recommended it to you, and you’re not sure what to do with it. Let’s start from the beginning: what is Google Tag Manager, why companies put it on their websites, and what you need to remember before you start clicking around. What is Google…
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