Shopify Sessions Dropped After 21 September? Your Store Is Probably Fine
Shopify changed how it counts sessions from 21 September 2026. Why sessions fell and conversion rate rose, which numbers did not change, and how to compare this sale season with last year.
If your Shopify sessions fell in late September while orders held steady, the likely cause is Shopify's reporting, not your traffic. Between 21 and 23 September 2026, Shopify changed how Analytics counts sessions. For many stores the visible result was fewer sessions and a higher conversion rate from one week to the next.
This matters now because festive and year-end sales are being compared with last year, and the two periods were measured differently.
What Shopify changed
According to Shopify's changelog and help centre:
- Sessions that Shopify identifies as bots are left out of session reports by default.
- Bot and system traffic is classified more consistently.
- Shopper journeys without a standard pageview still count as sessions.
- A session ends after 30 minutes of inactivity, and sessions are no longer split at midnight UTC.
Midnight UTC is 5:30 am in India, so the last change mostly affects shoppers browsing in the early morning.
Which numbers moved and which did not
| Changed | Not changed |
|---|---|
| Sessions and online store visitors | Orders |
| Conversion rate and add-to-cart rate | Sales |
| Reached checkout rate and checkout conversion rate | Customer counts |
| Bounce rate, pageviews per session, average session duration and searches |
Reports that tie orders or customers to sessions, such as sales by landing page or referrer, can also shift, even though the totals stay the same.
How to compare this season with last year
- Open Analytics > Reports and pick a sessions report, such as Sessions by landing page.
- Set the same Human or bot session filter for both periods.
- Bot classification only exists for sessions from 7 October 2025 onwards. Earlier periods can't be filtered, so comparisons that reach further back are only partly like for like.
- For older periods, compare orders, revenue and average order value, which this change never touched.
The Home page and Live View always leave bots out and the filter can't be changed there, so they won't match a report in which you've included bots.
What it means for decisions
- Don't cut ad spend or redesign a landing page because sessions dropped in the last week of September. Check orders first.
- If your conversion rate rose at the same time, the store didn't get better overnight. Reset your baseline from October.
- Apps and agencies that count sessions with their own tracking will now disagree with Shopify by a different margin. GA4 has its own bot filtering and session rules, so the two never matched exactly.
- A large drop tells you that much of what was counted as traffic was bots. Keep that in mind when judging a traffic source that looked strong last year.
Our Shopify CRO work starts with this kind of measurement check, because a test judged on the wrong baseline proves nothing. The CRO operating model explains how we set that baseline.
