GA4 vs Universal Analytics: What Actually Changed (And What You Lost)
It is July 1, 2023. A big day in the analytics world, since Universal Analytics officially stops collecting data today.
Universal Analytics stopps working and you are forced to switch to GA4. For a lot of people, it feels like showing up to work and finding out someone completely rearranged your desk, changed your computer’s operating system, and threw away half your files.
So what actually changed? And more importantly, what did we lose in the transition?
Let’s break it down in plain English, because Google’s official documentation reads like it was written by AI robots for martian AI robots.
The big picture: How data collection fundamentally changed
This is the most important thing to understand, and it explains why GA4 feels so different. Data collection.
Universal Analytics tracked “hits” — These were specific types of interactions like pageviews, events, transactions, and social interactions. Each had its own structure and rules.
GA4 tracks only “events” — Everything is an event now. A pageview? That’s an event. A purchase? Event. Watching a video? Event. Click a button? You guessed it: event.
At first, this sounds like it should make things simpler, right?
Everything’s just an event.
But in practice, it made GA4 harder to use for most people because now you have to understand event parameters, which are basically just extra details attached to each event.
In Universal Analytics, you had clear categories. In GA4, everything’s mushed together and you need to dig into parameters to understand what actually happened.
What you gained (the good stuff)
Okay, I’ll admit GA4 isn’t all bad. There are actually some improvements:
Combined web and app tracking
This is probably GA4’s biggest win. In Universal Analytics, if you wanted to track both your website and mobile app, you needed separate properties and it was a nightmare to combine the data. In GA4, you can track both in one place with “data streams”.
For most small sites without an app, this doesn’t matter. But if you’ve got both, it’s genuinely useful.
Better cross-device tracking
GA4 is much better at following users across multiple devices—like when someone browses on their phone, then buys on their laptop. Universal Analytics could do this, but GA4’s event-based model makes it way more accurate.
Privacy-friendly tracking (kinda)
GA4 automatically anonymizes IP addresses and works without third-party cookies, which helps with GDPR and other privacy laws. In Universal Analytics, you had to manually configure IP anonymization.
More customization (if you have time)
GA4 lets you customize reports by rearranging data cards and creating your own dashboards. Universal Analytics reports were pretty locked down.
The catch? Most people don’t have time to build custom reports. They just want to see their traffic.
What you lost (the painful stuff)
Here’s where things get rough. GA4 removed or made harder a bunch of features that people used every single day.
1. Views are completely gone
Remember Views in Universal Analytics? Those filtered versions of your data that let you exclude internal traffic, focus on specific subdomains, or give clients limited access?
GA4 has “data streams” instead, but they’re not the same thing at all. You can’t create filtered views of your data anymore. Everyone sees the same thing.
2. Bounce rate disappeared (sort of)
Bounce rate was one of the most-watched metrics in Universal Analytics. GA4 replaced it with “engagement rate,” which measures something completely different.
Bounce rate told you the percentage of people who left without doing anything. Engagement rate tells you the percentage who did do something (stayed for 10+ seconds, viewed multiple pages, or triggered a conversion event).
They’re inverse concepts, which means your brain has to do mental gymnastics every time you look at it. And honestly? Most people just miss bounce rate.
3. Sessions are calculated differently
In Universal Analytics, a session expired after 30 minutes of inactivity or at midnight. Simple.
In GA4, sessions still expire after inactivity, but they also end when campaign parameters change. So if someone clicks two different ads in the same visit, that’s counted as two sessions in GA4.
This means your GA4 session numbers will never match your Universal Analytics numbers, even for the same time period when you were running both. It’s confusing and makes year-over-year comparisons basically useless.
4. The account structure changed
Universal Analytics had: Account → Property → View.
GA4 has: Account → Property (and that’s it).
Again, no more Views. And now you have “data streams” instead, which are fundamentally different. If you manage multiple sites or need different access levels for different users, this gets annoying fast.
5. Custom dimensions and metrics are limited differently
In Universal Analytics, you could create 20 custom dimensions and 20 metrics (or 200 each if you had the paid 360 version).
In GA4, you can create 50 event-scoped dimensions, 25 user-scoped dimensions, and 50 custom metrics.
Sounds like more, right? But here’s the catch: they don’t work the same way. Event-scoped vs user-scoped is a whole different ballgame, and if you were using custom dimensions heavily in UA, migrating them to GA4 is a pain.
Plus, custom dimensions in GA4 only collect data from the moment you create them. No historical data.
6. The UI is just… worse
This isn’t a feature change per se, but it’s worth mentioning because it’s what people complain about most.
The Universal Analytics interface was clean and predictable. You knew where things were. Reports loaded in a consistent layout.
GA4’s interface is scattered, inconsistent, and requires way more clicks to get the same information. Finding anything takes longer. Reports feel less polished. And the whole thing just feels unfinished.
The metrics that changed names (and what they mean now)
Here’s a quick cheat sheet for metrics that exist in both but mean different things:
Users
- UA: “Users” = total users
- GA4: “Total Users” = total users (but not the primary metric anymore), “Active Users” = users who had an engaged session (this is the primary metric now)
Bounce Rate
- UA: Percentage who left without interacting
- GA4: Gone. Replaced with “Engagement Rate” = percentage who did interact
Sessions
- UA: Ends after 30 min inactivity or midnight
- GA4: Ends after 30 min inactivity OR when campaign parameters change
Can you import your old Universal Analytics data?
Short answer: No.
The data models are completely different (hits vs events), so there’s no clean way to import your historical UA data into GA4.
Google’s official recommendation was to run both Universal Analytics and GA4 side-by-side for as long as possible before UA shut down, giving you parallel data sets. But now that UA is dead, your old data just lives in the old UA property forever (which is read-only).
If you need to reference old data, you have to log into the old property. If you want year-over-year comparisons that span the UA/GA4 transition, you’re basically out of luck.
Bottom line: Is GA4 actually better?
Honestly? It depends who you ask.
For enterprise companies with dedicated analytics teams who want to track complex cross-device journeys and build custom event taxonomies, GA4 is probably an upgrade.
They can afford to pay $150,000 per year for GA4 360…
For small business owners, marketers, and webmasters who just want to see “how many people visited my site, where they came from, and what pages they looked at,” GA4 is frustrating, overcomplicated, and feels like a downgrade.
The data GA4 collects is powerful. The problem is that Google wrapped it in an interface that makes simple questions hard to answer.
That’s why a lot of people are using tools that pull GA4 data through the API and present it the way Universal Analytics used to—giving you the best of both worlds: GA4’s modern tracking with the simplicity everyone actually misses.
Missing the simplicity of Universal Analytics? ClarioMetrics connects to your GA4 data and gives you clear, easy-to-read reports without the confusion. Try it free.