Wilhelm von Mayer, D.Sc. 11/1/26 Wilhelm von Mayer, D.Sc. 11/1/26

Gemini Stopped Tagging Its Links. Your AI Traffic Now Looks Direct

For about three weeks Gemini added utm_source=gemini to cited links. Now it doesn't, and iPhone visits land in Direct. Here's how to still see that traffic in GA4.

Wilhelm von Mayer, D.Sc. 10/29/26 Wilhelm von Mayer, D.Sc. 10/29/26

Your Meta ROAS Could Jump Nov 12 Without a Single Extra Sale

A new Events Manager setting turns on by default and matches more purchases to your ads. Here's the 15-minute check to run before Black Friday muddies your reports.

Wilhelm von Mayer, D.Sc. 10/27/26 Wilhelm von Mayer, D.Sc. 10/27/26

GTM's New Optimize Button: Click It, but Not Blindly

Google now lets Tag Manager containers send data straight to Google destinations, skipping the extra gtag.js load. Here's how to opt in without breaking conversions.

Wilhelm von Mayer, D.Sc. 10/27/26 Wilhelm von Mayer, D.Sc. 10/27/26

Google Changed How GTM Handles gtag Config. Your Triggers May Misfire

Since October 8, every GTM container initializes on load and gtag config calls show up as dataLayer events. Here's how to find the tags that will double-fire.

Wilhelm von Mayer, D.Sc. 10/27/26 Wilhelm von Mayer, D.Sc. 10/27/26

GA4 Can Finally Block Spam Domains. One Wrong Entry Deletes Real Sales

GA4 now supports Include filters for hostnames, so only approved domains can send data. It kills spam, but it can also permanently drop checkout data.

Wilhelm von Mayer, D.Sc. 10/27/26 Wilhelm von Mayer, D.Sc. 10/27/26

Google Now Scores Your Data Strength. Here's How to Raise Yours

Google wants three things from you: tag gateway, a CRM connected through Data Manager, and enhanced conversions. What's real, what's hype, and the setup order we'd use.

Wilhelm von Mayer, D.Sc. 10/27/26 Wilhelm von Mayer, D.Sc. 10/27/26

GA4 Dashboards Are Here. Build One Page Your Boss Will Actually Read

GA4 now has drag-and-drop dashboards, capped at 15 cards on standard properties. That limit is a gift if you use it to focus on the numbers that drive revenue.

Wilhelm von Mayer, D.Sc. 10/27/26 Wilhelm von Mayer, D.Sc. 10/27/26

Meridian GeoX Is Free Now. Stop Trusting Platform-Reported ROAS

Google's open-source geo-testing tool, Meridian GeoX, is now generally available. Here's what it does, who should use it, and how to run your first holdout test.