At a glance
Avg Scroll Depth % is the average share of a page that visitors actually scroll through before they leave. Microsoft Clarity captures this from real session behaviour, so a low number is a strong hint that your most important content, offers, or calls to action are sitting below the fold where most people never reach them. For merchants, scroll reach is a free, direct read on whether page layout is doing its job.
| What it counts | The average proportion of page height reached across captured sessions in the window. |
| Sample type | Behavioural session data from Microsoft Clarity (heatmaps and session recordings), refreshed on the standard data refresh. |
| Why it matters | If visitors rarely scroll deep, key content and conversion prompts placed lower on the page go unseen. |
| Reading the value | Higher means visitors explore more of the page; lower means content below the fold is being missed. |
| Currency | percent |
| Time window | 30D vsP |
| Alert trigger | <50% |
| Sentiment key | clr_scroll_depth_avg |
| Roles | owner, marketing |
Calculation
Microsoft Clarity records how far down each page a visitor scrolls across captured sessions, then Vortex IQ averages that scroll reach over the selected window to produce a single percentage. No invented weighting is applied; it reflects what Clarity exposes for the pages in scope. See At a glance for the headline definition and the worked example below for a representative reading.Worked example
A representative reading of Avg Scroll Depth % for a typical merchant on Microsoft Clarity. Suppose your store shows an Avg Scroll Depth of 42% over the 30 days to 12 Mar 26, down from 58% in the prior period. That dip lines up with a homepage redesign that pushed the featured collection lower on the page, so most visitors never see it. Use Vortex Mind to trace the drop back to the layout change and the pages most affected, then ask Ask Viq in plain English which templates lost the most scroll reach so you can reorder the content that matters.Sibling cards merchants should reference together
| Card | Why merchants reach for it |
|---|---|
clr_worst_scroll_pages | Pinpoints the individual pages dragging the average down so you can fix layout where it hurts most. |
clr_excessive_scrolling_rate | High scroll volume with low reach can signal visitors hunting for content they cannot find. |
clr_avg_page_engagement_time | Pairs scroll reach with time on page to separate skimming from genuine engagement. |
clr_quick_back_rate | Shallow scroll plus fast exits often points to a mismatch between expectation and page content. |
clr_pages_per_session | Shows whether shallow scrolling coincides with visitors moving on or bailing out. |
Reconciling against Microsoft Clarity
Where to look in Microsoft Clarity’s own dashboard: Open the scroll heatmaps for the pages in question and review the Dashboard insights for scroll behaviour. Confirm the period and any device or channel filters match the Vortex IQ profile before comparing. Why the Vortex IQ value may legitimately differ:| Reason | Direction | What to do |
|---|---|---|
| Period boundary. Vortex IQ uses rolling windows by default; Clarity may use calendar periods. | Variable | Match the period range. |
| Sampling. Clarity may sample sessions on high-traffic sites; Vortex IQ reads what Clarity exposes. | Variable | Allow for sampling on busy stores. |
| Filter scope. Profile-level filters (device, channel, bot exclusion) may narrow the Vortex IQ view. | Variable | Match filter settings. |