Google Analytics 4 (GA4)
Google's current analytics platform that tracks user interactions across websites and apps using an event-based data model.
Why It Matters
GA4 is the foundation of digital measurement — without it, you cannot understand how users find, use, or convert on your site.
How It Works
GA4 collects data via a JavaScript tag on your site that fires events for page views, clicks, scrolls, and custom interactions. It uses machine learning to fill gaps from cookie restrictions and provides reports on acquisition, engagement, and conversions.
Real-World Example
A marketing team uses GA4 to discover that 60% of their conversions come from organic search on mobile, shifting budget toward mobile SEO.
Common Mistakes
Not configuring conversion events after GA4 setup
Comparing GA4 metrics directly to old Universal Analytics numbers
Related Terms
A tag management system that lets you deploy and manage tracking scripts on your website without editing code.
A tracked user action that represents a completed business goal, such as a purchase, signup, or form submission.
Tags appended to URLs that tell analytics tools exactly which campaign, source, and medium drove a visit.
Google Analytics 4 (GA4) FAQs
What replaced Universal Analytics?
Google Analytics 4 replaced Universal Analytics in July 2023, introducing event-based tracking instead of session-based pageview tracking.
Is GA4 free?
Yes, the standard version is free; GA4 360 is the paid enterprise version with higher data limits and SLAs.
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