TL;DR
Enable the Scroll Depth built-in variable in GTM (Variables > Configure > Scroll Depth Threshold). Create a Scroll Depth trigger: choose Vertical Scroll Depths, select Percentages, and enter thresholds (25, 50, 75, 100). Create a GA4 Event tag with event name 'scroll_depth' and parameters including scroll_percentage (from the Scroll Depth Threshold variable) and page_path. This data shows which pages engage users and where they lose interest — useful for content optimisation and landing page analysis.
Overview
Enable the Scroll Depth built-in variable in GTM (Variables > Configure > Scroll Depth Threshold). Create a Scroll Depth trigger: choose Vertical Scroll Depths, select Percentages, and enter thresholds (25, 50, 75, 100). Create a GA4 Event tag with event name 'scroll_depth' and parameters including scroll_percentage (from the Scroll Depth Threshold variable) and page_path. This data shows which pages engage users and where they lose interest — useful for content optimisation and landing page analysis.
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Frequently asked
Questions & answers
How long does setup take?
Most configurations take 10-30 minutes. Full campaign setup and ongoing optimisation is a continuous process.
What budget should I start with?
Start with enough to generate at least 50 conversions per week for the platform's algorithm to learn effectively. This varies by industry and CPA.
When should I expect results?
Allow 2-4 weeks for the initial learning phase. Meaningful performance trends typically emerge after 30 days of consistent spending.
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