Blog
Consent for MS Clarity
Microsoft Clarity wants to start passing consent status from November 1, 2025. If you meet the following three conditions, I would not change the settings: Otherwise, you need to set up Clarity measurement. What’s happening Microsoft implements more or less the same logic for Clarity as Google Analytics 4. They do not place cookies without…
The 5 most common mistakes in cookie bar settings
One of the most complicated aspects of setting up website analytics is integrating a cookie bar. I’m not referring to legal requirements, but rather technical accuracy. It seems so simple, yet it’s not. Recently, I’ve come across recurring errors in settings. Below, I’ll describe these errors and how to identify them on a website. I…
Bugs 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…
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…
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…
