How to Track Custom Scroll Depth in GA4 (When 90% Isn't Enough)
GA4 tracks scrolling automatically, but it only gives you credit if the reader hits the very bottom of the page. If you are writing detailed digital marketing case studies, you need to know if people are reading 25%, 50%, or 75% of your content. Here is how to take control of your scroll data in 5 minutes. The "Prompt-to-Practice" Secret: Don't get stuck searching for outdated GA4 tutorials. Here is the exact prompt I used to generate the tracking code for this setup: "Write a simple, lightweight JavaScript snippet that calculates page scroll depth. When the user reaches 50% of the page, fire a standard GA4 gtag event named 'custom_scroll' with a parameter for the percentage. Ensure it only fires once per page load." The Real-World Example: I recently published a detailed Omnichannel Visibility Strategy. I wanted to know if readers were actually making it past the introduction to the core framework. By implementing a 50% scroll tracker, I could see ex...