What Is Google Analytics 4 (GA4)?

What Is Google Analytics 4 (GA4)?

GA4 arrived, everyone panicked, and half the internet declared their reports "broken." They weren't broken , they were just built on a completely different model. GA4 measures the web the way people actually use it now: across devices, apps and sessions. Here's what it is and why the change was more than Google being difficult.

The short version

Google Analytics 4 (GA4) is Google's current web and app analytics platform, built on an event-based data model that tracks user interactions across websites and mobile apps in a single view. It replaced Universal Analytics in 2023 and measures every interaction as an event, rather than organising data around sessions and pageviews.

The event-based model

Universal Analytics organised everything around sessions and pageviews. GA4 treats every interaction , a page view, a scroll, a click, a video play, a purchase , as an event. This is more flexible and better suited to modern, app-like websites and cross-device journeys, but it means old reports and metrics don't map one-to-one. Understanding that "everything is an event" is the key to not being confused by GA4.

What GA4 does well

• Unifies web and app data in a single property.

• Tracks users across devices and sessions more coherently.

• Uses machine learning for predictive metrics and gap-filling.

• Is built for a privacy-first, cookie-limited future.

• Integrates tightly with Google Ads and BigQuery.

Why the switch happened

Google didn't retire Universal Analytics to annoy marketers. The old model was built for a desktop, single-session web that no longer exists. Privacy regulation, cookie restrictions and cross-device behaviour all demanded a new approach. GA4's event model and privacy-oriented design are Google's attempt to keep analytics useful as third-party tracking erodes. It's imperfect, but it's built for where the web is going, not where it was.

Getting value from it

GA4 rewards setup effort. Out of the box it captures basics, but the real value comes from defining the events and conversions that matter to your business, configuring them properly, and building reports around your actual goals rather than the defaults. Many teams underuse it simply because they never configured it beyond the automatic install. Our performance team sets GA4 up around the outcomes you care about, so the data answers real questions instead of piling up unread.

FAQ

Is GA4 free?

Yes, the standard version is free, like Universal Analytics was. There's a paid enterprise tier (Google Analytics 360) for very high-volume needs, but most businesses run the free version, which is powerful when properly configured.

Why do my GA4 numbers differ from Universal Analytics?

Because the measurement models differ fundamentally. GA4 counts events, not sessions and pageviews, and defines metrics like "users" and "bounce" differently. Direct comparisons rarely match , you're measuring the same reality with a different ruler.

Do I still need Google Search Console with GA4?

Yes. GA4 tells you what users do on your site; Search Console tells you how you appear in Google Search , queries, rankings and clicks before arrival. They answer different questions and work best together.

Sources

• Google Analytics 4 , Official Documentation: https://support.google.com/analytics/answer/10089681

• Google Analytics Help Center: https://support.google.com/analytics/

• Google , Analytics Migration: https://support.google.com/analytics/answer/11583528