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Marketing Glossary· GA4

What is GA4 (Google Analytics 4)?

By Nikhil Sharma · Updated 1 November 2026 · Marketing Glossary
Definition

Google Analytics 4 (GA4) is Google’s current analytics platform, built on an event-based data model that tracks user interactions across web and app.

What is GA4?

GA4 replaced Universal Analytics (which stopped processing data in 2023). It measures everything as events rather than page-view-centric sessions, tracks users across web and app, and leans on modelling and privacy-safe measurement for a cookie-constrained world.

GA4 vs Universal Analytics

  • Event-based, not session/page-view-based.
  • Engagement rate replaces the old bounce rate.
  • Cross-platform web + app in one property.
  • Built-in data-driven attribution and explorations.

Why it matters

GA4 is where you see which channels drive traffic, how users engage, and — with UTMs and conversions configured — what actually produces leads. Set up well, it is the backbone of honest, revenue-tied reporting rather than vanity metrics.

Related terms
Bounce RateAttributionUTMKPICRO
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Written & reviewed by Nikhil Sharma
Founder, Fabulous Media
Nikhil has led growth for 850+ brands across 35 nations since 2008. Fabulous Media is an invitation-only growth agency that reports on pipeline and revenue, not vanity metrics. Meet the team · Request an invite.

Questions, answered

Google Analytics 4 is Google's current analytics platform. It uses an event-based data model, tracks users across web and app, and replaced Universal Analytics, which stopped processing data in mid-2023.

GA4 measures events rather than sessions and page views, spans web and app in one property, replaces bounce rate with engagement rate, and includes data-driven attribution. Universal Analytics was page-view and session centric.

Yes, the standard version of GA4 is free, with a paid enterprise tier (Google Analytics 360) for very large organisations needing higher limits and support.

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