When Does Google Analytics 4 Start?

Thinking about when Google Analytics 4 starts is like asking when smartphones replaced flip phones - it’s already happened. Universal Analytics, the version most of us used for years, has been retired, and GA4 is now the official standard for measuring web and app traffic. This article walks you through the key dates of the changeover, what the switch truly means for your data, and what you need to do in a world where GA4 is king.

The GA4 Transition Timeline: The Official Dates

The switch from Universal Analytics (UA) to Google Analytics 4 didn't happen overnight. It was a phased process with a couple of critical deadlines. If you're just catching up, these are the dates that mattered most.

July 1, 2023: Universal Analytics Stops Processing New Data

This was the big one. On this day, standard, free Universal Analytics properties stopped processing new hits. In simple terms, any activity on your website - visits, clicks, pageviews, purchases - was no longer recorded in your old UA property. Your website was still online and people were still visiting, but Universal Analytics stopped listening.

All new data from this date forward began flowing exclusively into your Google Analytics 4 property, assuming you had one set up. For many, Google automatically created a parallel GA4 property to ensure data collection didn't stop entirely, but the historical chain in UA was broken for good.

July 1, 2024: Access to Universal Analytics Ends Completely

For a year after UA went dark, you could still log in to view your historical reports and analyze past performance. This grace period gave everyone time to export critical data for year-over-year comparisons and long-term trend analysis. However, that window has now closed.

As of July 1, 2024, the Universal Analytics interface and its data are no longer accessible. Any UA reports you didn't save or export are now permanently gone. While paid Universal Analytics 360 properties had this same deadline, this date marked the true and final end of the Universal Analytics era for everyone.

Why Did Google Force the Switch to GA4?

This wasn't just a cosmetic update, Google rebuilt its analytics platform from the ground up to address fundamental shifts in how people use the internet. Understanding the "why" behind GA4 can help you appreciate its new features and structure.

1. A Privacy-First Approach

With data privacy regulations like GDPR and CCPA reshaping the digital landscape and third-party cookies being phased out, a new measurement model was necessary. Universal Analytics was heavily reliant on cookies. GA4 was built for a future with more stringent privacy controls.

It includes features like IP address anonymization by default and uses machine learning to fill in data gaps created by users who decline cookies. This "consent mode" helps you respect user privacy choices while still getting valuable insights through modeled data.

2. The Modern Customer Journey is Cross-Device

Universal Analytics was born in the desktop era. Its session-based model was designed to track a single visit to a website. But today, a user might see your ad on their phone, browse your site on their tablet, and finally make a purchase on their laptop. UA struggled to connect these dots, often treating the same person as three different users.

GA4 uses an event-based model. Instead of focusing on "sessions," it tracks every interaction - a click, a scroll, a video view, a form submission - as a distinct "event." These events are tied to a user, not a device, giving you a unified view of the entire customer journey across your website and your mobile app.

3. AI-Powered Predictive Insights

The new data model in GA4 allows Google to apply powerful machine learning capabilities directly within your reports. GA4 can automatically identify trends and notify you of significant changes in your data. It also introduces predictive metrics, like:

• Purchase probability: The likelihood a user will purchase in the next 7 days.
• Churn probability: The likelihood an active user will not visit your site in the next 7 days.
• Predicted revenue: The expected revenue from a user over the next 28 days.

These insights empower you to create more effective audience segments for your ad campaigns - for example, targeting users with a high probability of purchasing or re-engaging users who are likely to churn.

I Haven't Dealt With This Yet. What Should I Do Now?

If you're reading this article and feeling behind, don't panic. The past deadlines can't be changed, but you can take clear, practical steps to get control of your analytics today and set yourself up for future success.

Step 1: Check Your GA4 Property Immediately

Log in to Google Analytics. You will land directly in the GA4 interface. Find the property switcher in the top-left corner and ensure you're looking at a property that does not have a "UA-" prefix in its ID number. GA4 property IDs start with "G-".

Next, check if it's collecting data. The easiest way is to go to Reports > Realtime. If you see active users on your site right now, congratulations, your GA4 setup is working. If you see zero activity, your tracking code is likely not installed correctly, and you'll need to add the GA4 tag to your website's code or through Google Tag Manager.

Step 2: Start Learning the New GA4 Layout

The GA4 interface is a major departure from Universal Analytics. Don't expect to find your old favorite reports in the same place. Here are a few key adjustments to make:

• The Event-Based Model: Remember, everything's an event now. What used to be tracked as simple Pageviews are now page_view events. Scrolling is a scroll event. Conversions, which were "Goals" in UA, are now just specific events you mark as important (like purchase or form_submission).
• The "Explore" Section is Your New Playground: Many of the standard, pre-built reports from UA have been replaced by the more flexible "Explore" hub. This is where you can build custom free-form tables, funnel explorations, and user journey reports that are much more powerful than UA's equivalents, but they require a bit more manual setup.
• It's "Engagement Rate," Not "Bounce Rate": "Bounce rate" - the percentage of single-page sessions - is mostly gone. GA4 replaces it with "Engagement rate." A session is counted as "engaged" if the user was active for more than 10 seconds, fired a conversion event, or visited at least two pages. It’s a much better indicator of whether users are actually interacting with your site.

Step 3: Grieve Your Lost UA Data and Move On

This is the tough part. If you did not export your historical Universal Analytics data before July 1, 2024, it is gone forever. There is no hidden backup or secret way to retrieve it. Agonizing over it won't help.

The best and only course of action is to shift your focus forward. Start building your new historical benchmark in GA4. The insights you gather from now on will become your new source of truth for all future analysis, plans, and reports.

Final Thoughts

The transition from Universal Analytics to Google Analytics 4 is officially complete. With UA now fully decommissioned, the focus for all businesses and marketers must now be on understanding and leveraging the powerful, if complex, features of GA4 to measure performance and guide strategy.

Rather than wrestling with the complex GA4 "Explore" section or spending hours trying to rebuild your old reports, a simpler path exists. We built Graphed to do the heavy lifting for you. You can connect your Google Analytics 4 account in a few clicks, and simply ask for the reports and dashboards you need in plain English - "show me my top 10 landing pages in a table" or "make a line chart of traffic by channel for the last 90 days." Graphed builds it instantly, giving you back time to focus on analyzing insights, not fighting with your analytics tool.