At year end, most ecommerce store owners review their analytics to plan next year’s budget and strategy. But if your tracking has gaps, the data you are building those plans on is wrong. A year-end tracking audit catches any issues that built up during the year, verifies your data is reliable, and sets you up with clean tracking data heading into January.
1. Audit GA4 Annual Revenue vs Shopify Revenue
Pull your GA4 annual purchase revenue (Reports → Monetisation → Ecommerce Purchases → last 12 months) and compare it to your Shopify Orders report for the same period.
A gap of more than 10–15% warrants investigation:
- GA4 much lower than Shopify: purchase events are not being captured for all orders. Common causes: checkout tracking gaps, high ad blocker usage in your audience, or tracking outage during part of the year.
- GA4 higher than Shopify: purchase events are firing multiple times per order (duplicate tracking). Check for duplicate pixel implementations or non-deduplicated CAPI events.
2. Review Meta Events Manager Annual Data
In Meta Events Manager, look at the annual Purchase event count and compare to your Shopify order total. Also check the Event Match Quality score — if it is below 6.5, you have an attribution quality problem that affected your 2025 campaign performance and should be fixed before January.
3. Audit UTM Coverage for the Year
In GA4 → Acquisition → Traffic Acquisition, filter by the full year. Check what percentage of sessions show as Direct or (not set) vs properly attributed sources.
If Direct traffic is above 20–30%, you likely have UTM gaps — email campaigns, social media posts, or influencer links that were not tagged. Note which channels are undertagged and create a UTM tagging standard for the coming year.
4. Check Google Ads Annual Conversion Data
In Google Ads, pull the annual conversion count for your Purchase conversion action. Compare to Shopify’s total orders for sessions that arrived via Google Ads (visible in GA4 by filtering by Source = google and Medium = cpc).
If Google Ads shows significantly more conversions than the GA4 filtered count for the same period, your Google Ads attribution window may be capturing conversions that GA4 attributes to other channels. This is expected to some degree but a large gap suggests attribution window misconfiguration.
5. Review Campaign Attribution by Channel
In GA4 → Advertising → Attribution → Conversion Paths, review how your traffic channels appeared in buyer journeys over the full year. Which channels most commonly appeared as first touchpoints? Which as last? Were there channels that frequently appeared in paths but received zero credit in your last-click reporting?
This review often reveals that some channels (typically upper-funnel — Display, YouTube, organic social) consistently assist conversions but receive minimal last-click credit. Going into next year, you can factor this insight into your budget allocation rather than cutting these channels based only on their last-click ROAS.
6. Check for Any Tracking Outages During the Year
In GA4, look at daily session counts for the full year. Look for days or weeks where the daily count drops suddenly to near zero or to an abnormally low level. These are likely tracking outages — periods when your GA4 tag stopped firing.
Common causes: a Shopify theme update that removed tracking code, a GTM publish that broke a tag, a Shopify app conflict. If you find outage periods, note the dates so you do not make budget decisions based on incomplete data from those weeks.
7. Verify Tracking Is Ready for Q1
After reviewing the year, confirm your tracking setup is correct going into January:
- GA4 purchase events firing correctly on thank-you page
- Meta Pixel + CAPI both active with EMQ above 7.0
- Google Ads conversion tag status: Recording
- UTM tagging plan documented for all campaign types
Any issues found during the audit should be fixed in December before January campaign budgets start flowing.
Document Your Baseline Metrics for Next Year
Record your end-of-year metrics so you can meaningfully compare at the end of next year:
- Total Shopify revenue
- GA4 tracked purchase revenue
- GA4/Shopify revenue match rate
- Meta EMQ score for Purchase
- Best-performing traffic source by revenue
- Overall store conversion rate
Book your free Shopify tracking audit here and we will run through a complete year-end tracking review on your store before January.