The Page Flow Sankey diagram (under Journeys → Flows) visualises the most common paths visitors take through your site. It looks like a river splitting into tributaries — useful for spotting unexpected exits, dead-end pages, and the natural shape of your site's navigation.
The three columns
Reading left to right:
- Sources — where the visit started. Either a referring page on your own site, or a top-level entry point grouped as
(direct),(organic), or(referral). - Current page — the page currently being analysed (you pick this with the page selector at the top).
- Next steps — where visitors went after the current page, including
(exit)if they left the site.
What the band thickness means
The thickness of each band is proportional to the number of sessions that took that path. A band representing 1,200 sessions will be roughly 12× thicker than a band representing 100 sessions.
Hover any band to see:
- The exact session count.
- The percentage of all sessions on the current page.
- Average time on page before transitioning.
Reading common patterns
A thick band to (exit)
This is normal — most sessions end somewhere. But if exit is the single thickest outgoing band on a page that's supposed to lead somewhere (e.g. your homepage), that's a warning sign. Click the band to see those exit-only sessions in session replay.
A thick band returning to the source
A loop ("blog post → blog post → blog post" or "/page → /page") usually means visitors are clicking related links or scrolling within the same page. Healthy on a content site, suspect on a checkout flow.
Surprising entry sources
The Sources column sometimes reveals a top page you didn't realise was funnelling traffic — e.g. an old marketing page that's still ranking. Use this to find under-the-radar entry points worth optimising.
Filtering the diagram
Above the Sankey there's a filter bar. Common filters:
- Country — see flows for one geography only.
- Device — separate mobile flows from desktop.
- Source — only sessions from organic search, or only from a specific campaign.
Filtered diagrams need ~100 sessions in the slice to be meaningful — the band labels show the absolute count so you can spot thin slices.
Plan limits
Page Flow analysis is on every plan, but only the Pro plan and above retains 730+ days of data for long-window flow analysis.