GA4 Migration: What You Lost and How to Get It Back
What changed in the migration from Universal Analytics to GA4. Features you lost, new capabilities, and how to adapt your analytics strategy.
Universal Analytics officially stopped processing data in July 2024. If you migrated to GA4 but feel like something's missing, you're not wrong. Here's what changed and how to adapt.
What GA4 Replaced
| Universal Analytics | GA4 Equivalent |
|---|---|
| Views | Data Streams |
| Goals | Key Events (Conversions) |
| Bounce Rate | Engagement Rate (inverted) |
| Sessions-based model | Event-based model |
| Category/Action/Label | Event name + parameters |
| Custom Dimensions (20 max) | Custom Dimensions (50 event, 25 user) |
| Content Groupings | Content Group parameter |
| Calculated Metrics | Not available (use BigQuery) |
What You Lost
1. Views and Filters
UA let you create multiple Views with different filters (e.g., one excluding internal traffic, one for a specific subdirectory). GA4 doesn't have Views. Instead: - Use data filters (limited) for internal traffic - Use Explorations with segments for custom views - Use BigQuery for complex filtering
2. Custom Channel Groupings
UA allowed custom channel definitions. GA4 has a fixed default channel grouping. You can create custom channel groups, but they work differently.
3. Bounce Rate (Sort Of)
GA4's bounce rate is the inverse of engagement rate. A "bounce" in GA4 is a session that: - Lasted less than 10 seconds - Had no conversion events - Had fewer than 2 page views
This is actually a better metric than UA's bounce rate (which just measured single-page visits).
4. Annotations
UA had chart annotations. GA4 doesn't. Use external documentation to track changes.
What You Gained
1. Cross-Platform Tracking
GA4 natively tracks web and app in one property. UA needed separate properties.
2. Better Engagement Metrics
Engagement rate, engaged sessions, and average engagement time are more meaningful than UA's bounce rate and session duration.
3. Free BigQuery Export
Previously a GA360-only feature, now available to all GA4 users.
4. Predictive Audiences
GA4 can predict purchase probability and churn probability using machine learning.
5. Consent Mode
Built-in consent handling with behavioral modeling to recover data from cookie-declined users.
Post-Migration Checklist
If you migrated but never validated your GA4 setup:
- Are all conversions from UA recreated as GA4 key events?
- Are custom dimensions migrated?
- Is enhanced measurement configured?
- Are UTM parameters consistent between old and new campaigns?
- Is data retention set to 14 months?
- Are audiences recreated and synced to Google Ads?
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