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What is Scroll Depth? Definition and Content Engagement Tracking
Scroll depth measures how far visitors scroll down a page. It is often used to understand whether visitors are actually seeing important content, CTAs, pricing details, forms, or article sections.
Scroll depth can be measured as a percentage, pixel depth, or milestone event.
Scroll depth examples
Common scroll milestones include:
- 25% scroll
- 50% scroll
- 75% scroll
- 90% scroll
- Reached pricing section
- Reached CTA section
- Reached comments
- Reached footer
For long pages, section-based scroll tracking can be more useful than percentage tracking.
Why scroll depth matters
Scroll depth helps answer whether visitors engage beyond the first screen. A page with high traffic but low scroll depth may have weak intent match, poor page speed, confusing layout, or an unconvincing introduction.
It is especially useful for blog posts, landing pages, documentation, and long product pages.
Limits of scroll depth
Scroll depth does not prove attention. Someone can scroll quickly without reading. Use it with time on page, CTA clicks, conversion rate, and event tracking.
Swetrix supports custom event tracking, making it possible to measure meaningful scroll milestones alongside traffic sources and conversions.
Related terms: engagement rate, time on page, event tracking, and landing page.
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