Google Analytics 4, or GA4, is Google's current analytics platform: an event-based model that tracks how people find and use your site, and which channels actually drive enquiries and sales.
Google Analytics 4, or GA4, is Google's current analytics platform. It replaced Universal Analytics in July 2023, so if you have a Google Analytics account today, GA4 is what you are running. At its core it answers the two questions any business owner cares about: how do people find my site, and what do they do once they are there.
The big change from the old version is the data model. Universal Analytics counted sessions and pageviews. GA4 records everything as an event instead, a page view, a scroll, a button click, a form submission, a purchase, each with its own parameters. That sounds like plumbing, but it matters: it lets GA4 follow a customer's journey across your site, and even across devices, in a way the old session-based model never could, and it treats a website and an app the same way.
GA4 is where you find out which channels actually earn their keep. Set up properly, it can show you that a paid campaign brought plenty of visits but few enquiries, while an old blog post quietly brought a handful of good ones. Most sites feed events into GA4 through Google Tag Manager, mark the important ones as key events with conversion tracking, and use GA4's attribution modelling to decide which touchpoint gets the credit. Getting that chain right is most of what my analytics and tracking work involves.
One honest caveat: GA4 is not a perfect record of reality. Ad blockers and cookie consent choices mean some activity goes unrecorded, and Google's own data thresholds can separately hide small-audience demographic or search-term data from certain reports for privacy reasons, without affecting the underlying event counts. Between the two, treat the numbers as a well-informed estimate, not a headcount. It is genuinely more capable than the old version, but it has a steeper learning curve and an interface that takes getting used to. Treat it as a reliable guide to trends and proportions rather than an exact tally to the last visitor.
Key points
- GA4 is Google's current analytics platform; it replaced Universal Analytics in July 2023.
- Everything is recorded as an event, not a session or pageview, which is a more flexible model.
- It tracks web and app together and can follow the same person across devices.
- The real value is seeing which channels actually drive enquiries and sales, not just clicks.
- The headline numbers are a solid estimate, not an exact count, mainly thanks to ad blockers and consent choices; data thresholds separately hide small-audience detail in some reports rather than affecting the totals.
Frequently asked questions
Common questions about google analytics 4.
If you use Google Analytics at all, you are already on it. Universal Analytics stopped collecting data in July 2023 and its old reports have since been retired, so there is no earlier version left to move from. The real question is whether yours is set up to record the events that matter to your business, or just tracking page views on the default install.
Honestly, yes, at least at first. The event-based model is more powerful but less intuitive than the old sessions-and-pageviews reports, and the interface moves things around. Most business owners do not need to master it; they need a handful of reports that answer real questions. I would rather set those up for you than hand over a tool you find baffling.
Close enough to trust for decisions, not precise to the last visitor. Ad blockers and cookie consent choices mean some activity goes unrecorded. Google's own data thresholds do not affect what is recorded, but they can hide small-audience demographic or search-term data in specific reports for privacy reasons. Treat GA4 as a reliable read on trends and proportions rather than an exact headcount. If it says one channel drives five times the enquiries of another, believe the ratio, just not necessarily the exact figures.
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