GA4 vs Universal Analytics: The Migration Guide for Google Ads Managers

GA4 is Here to Stay

Universal Analytics is gone. GA4 is the foundation for all Google measurement going forward. For Google Ads managers, understanding GA4 event-based model is now a core competency.

The Key Difference: Event-Based vs Session-Based

UA tracked sessions and pageviews. GA4 tracks events — every interaction is an event with parameters. This gives you far more granular data, but requires more intentional setup.

Setting Up Google Ads Conversion Actions in GA4

In GA4, mark key events as Conversions. These automatically sync to your linked Google Ads account. Always use Primary vs Secondary conversion action settings in Google Ads to control what Smart Bidding optimizes toward.

Building High-Value Audiences for RLSA

GA4 audience builder allows predictive audiences — users likely to purchase in the next 7 days — a powerful RLSA signal unavailable in UA. Connect GA4 to Google Ads and enable these for remarketing campaigns.