A page view tells you someone arrived. It says nothing about what happened next. Did they read two sentences and leave? Did they scroll to the bottom and spend five minutes with your content? Page views can't answer that. Scroll depth can.
What scroll depth actually measures
Scroll depth tracks how far down a page a visitor scrolls, typically expressed as a percentage. A visitor who scrolls to 80% of a long-form article has engaged meaningfully. A visitor who reaches 5% almost certainly bounced off the headline.
Why the default milestones are wrong
Most analytics tools use 25%, 50%, 75%, and 100% as default scroll milestones. These are arbitrary. On a short landing page, 25% might mean they've already passed your CTA. On a 5,000-word guide, 25% means they've barely started.
Better approach: set milestones based on your actual content layout.
| Page type | Meaningful milestones | Why |
|---|---|---|
| Landing page | CTA position, pricing section, testimonials | You want to know if visitors see the elements that drive conversion. |
| Blog post | End of introduction, mid-article, conclusion | Shows whether people read past the hook. |
| Product page | Feature list, comparison table, add-to-cart | Tells you which sections influence buying decisions. |
What to do with scroll depth data
1. Find where people drop off
If 70% of visitors reach your introduction but only 15% reach the CTA at the bottom, the page is too long or the content isn't holding attention. Consider moving the CTA higher, shortening the page, or improving the middle sections.
2. Validate your layout decisions
Placed an important message at the 60% mark? Check how many visitors actually see it. If the answer is "not many", move it up. Design decisions should be informed by real behaviour, not assumptions about how people scroll.
3. Combine with bounce rate
A page with a high bounce rate and deep scroll depth is fine – people read the content and left satisfied. A page with a high bounce rate and shallow scroll depth has a real problem: visitors aren't finding what they expected.
4. Test changes and measure the impact
Rewrote your introduction? Compare scroll depth before and after. If more visitors now reach the 50% mark, the new intro is working. Scroll depth gives you a concrete way to measure content changes that page views simply can't.
Grandma's take: Page views count arrivals. Scroll depth counts attention. If you're making layout decisions, writing content, or placing CTAs without knowing how far people scroll, you're guessing. And Grandma didn't raise you to guess.
Setting it up
With Grandma Knows, scroll depth tracking is automatic – no extra configuration needed. Your dashboard shows how far visitors scroll on every page, so you can spot drop-off points and make informed layout decisions from day one.
- Check your dashboard's scroll depth card to see average and median scroll percentages per page.
- Set up conversion goals based on scroll milestones for pages where depth matters most.
- Review scroll data alongside bounce rate to get the full engagement picture.