Scroll depth records how far people scroll, often in steps such as 25, 50, 75 and 100 percent. GA4 records a scroll event at 90 percent by default, and you can add finer tracking.
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Reading it
Use it to see whether people reach key sections such as pricing or a call to action. Scroll depth tells you where attention fell off, not whether anyone read what they passed.
Pair it with other signals
Combine scroll with time on page, clicks and conversions. A short page can show full depth with no engagement, and a long one can show shallow depth but strong conversion.
Common mistakes
Treating deep scroll as success
Reaching the bottom is not the goal. Conversion is.
Frequently Asked Questions
Add custom scroll events through Google Tag Manager with scroll depth triggers.
Keep reading
- Engagement rate: Engagement rate is the share of sessions that were engaged sessions. In GA4 it is engaged sessions divided by total sessions, the inverse of bounce rate.
- Average engagement time: Average engagement time is how long a page or app was in the foreground for users, on average. GA4 reports it per active user and per session.
- Heatmap: A heatmap is a color overlay on a web page that shows where visitors click, tap, move or scroll, with warmer colors marking more activity.
- Scroll Map: A scroll map shows how far down a page visitors scroll, using color bands to mark what share of people reached each point.
- Active user: An active user is a person GA4 counts as having engaged with your site or app in a period. It is the default user metric in most GA4 reports.
- Annotation: An annotation is a dated note on an analytics chart that records an event, such as a release, tracking change or algorithm update, so trends are read correctly.
- Bounce rate: Bounce rate is the share of sessions where the visitor did not engage. GA4 defines it as the inverse of engagement rate, unlike the old single-page definition.
- Conversion Rate: The share of visitors or sessions that complete a goal, such as a sign-up or demo request. The link between search traffic and new customers.
