How to Measure Marketing ROI (Even If You’re Not a Marketer)
A few years ago, a small e-commerce client asked me: “We’re spending €2,000 a month on ads. Is it working?” I couldn’t give them a...
Jan van Dijk · Apr 4, 2026
Practical guides on web analytics, marketing metrics, and online privacy — written for beginners.
A few years ago, a small e-commerce client asked me: “We’re spending €2,000 a month on ads. Is it working?” I couldn’t give them a...
Jan van Dijk · Apr 4, 2026
When Google announced it would phase out third-party cookies in Chrome, I got calls from three clients the same week asking what it meant for...
Jan van Dijk · Mar 31, 2026
If you’ve browsed the internet in the last few years, you’ve seen them — those pop-ups asking you to “accept cookies” before you can read...
Jan van Dijk · Mar 25, 2026
As a Dutch web analyst, GDPR is something I deal with every single day. When the regulation came into effect in 2018, it changed the...
Jan van Dijk · Mar 19, 2026
I remember the first time a client showed me their GA4 dashboard and asked, “so what does all this mean?” I froze. There were charts,...
Jan van Dijk · Mar 14, 2026
When I first started looking at analytics data, the difference between sessions vs users confused me for weeks. A single person can generate multiple sessions...
Jan van Dijk · Mar 8, 2026
A few years ago, one of my clients once changed their CTA button from green to orange — and saw a 22% lift in conversions....
Jan van Dijk · Mar 2, 2026
When I first helped a small business client analyze their traffic sources, they were puzzled by one line in their Google Analytics report: referral traffic....
Jan van Dijk · Feb 24, 2026
Google Analytics 4 gives you a modern, event-based view of your website traffic. When I first switched from Universal Analytics to GA4 back in 2023,...
Jan van Dijk · Feb 17, 2026
When I first started consulting for small e-commerce shops in Amsterdam, I kept hearing the same complaint: “We get plenty of visitors, but nobody buys...
Jan van Dijk · Feb 10, 2026
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