Google Analytics 4 Review
Free web and app analytics platform from Google with cross-platform measurement, machine learning predictions, and deep integration with Google Ads and Search Console.
Google Analytics 4 is the default starting point for web and app measurement and there is no realistic free-tier competitor at the same capability level. The event-based data model, machine learning predictions, cross-platform attribution, and native Google Ads integration are genuinely best-in-class. The cost is complexity: GA4 has a steeper learning curve than its Universal Analytics predecessor and requires more deliberate setup to get clean data.
Pros and cons
- Completely free for standard use, covering unlimited hits with no per-event or per-session pricing
- Cross-platform measurement tracks user journeys across websites and apps in a unified data model
- Machine learning surfaces predictive audiences, purchase probability, and churn probability without manual model building
- Native Google Ads integration shares audiences and conversion data bidirectionally, improving campaign targeting without export friction
- Google Search Console integration connects organic search queries to on-site behavior in the same interface
- Data sampling applies in the standard interface for large properties, reducing precision on high-traffic reports
- The event-based model requires more configuration than Universal Analytics to get standard reports working cleanly
- Data retention is limited to 14 months by default in the standard interface, with 2-month or 14-month options only
- BigQuery export (free on GA4) is needed for unlimited historical data and unsampled queries, adding technical requirements
- No built-in white-label or client reporting features: agencies need a separate reporting layer to deliver GA4 data to clients professionally
What is Google Analytics 4?
Google Analytics 4 (GA4) is the current version of Google Analytics, released in October 2020 and made the mandatory replacement for Universal Analytics in July 2023. It is the most widely used web analytics platform in the world, available for free to any website or app. GA4 uses an event-based data model rather than the session-based model of Universal Analytics, which enables more flexible tracking of user behavior across web and mobile without pre-defined pageview or session constructs.
The machine learning layer is one of GA4's strongest assets. Predictive metrics estimate purchase probability and churn probability for individual users based on observed behavior. Predictive audiences let you create remarketing segments for Google Ads automatically, targeting users most likely to purchase within the next seven days or users predicted to be high-value over their lifetime. Proactive Insights automatically surfaces anomalies, trend changes, and growth opportunities in your data without requiring custom alerting setup.
GA4 integrates natively with the Google ecosystem: Google Ads for bidirectional audience and conversion sharing, Google Search Console for organic query data alongside behavioral data, Google Cloud for BigQuery export, Display and Video 360, and Search Ads 360. The BigQuery export is free for GA4 properties and gives teams unsampled, row-level event data for custom analysis, building the bridge between Google's free analytics layer and enterprise data infrastructure.
Core features
Event-Based Measurement
GA4 tracks all user interactions as events rather than sessions, which allows flexible measurement of any behavior across websites and apps in a unified schema. Standard events cover page views, scrolls, outbound clicks, site searches, video engagement, and file downloads automatically. Custom events can be created without code using Google Tag Manager or with code for precise tracking of product-specific interactions.
Machine Learning and Predictive Analytics
Predictive capabilities estimate purchase probability, churn probability, and revenue prediction per user based on observed patterns. These appear as ready-made audience segments you can export directly to Google Ads for remarketing. Proactive Insights automatically detects significant changes in your data, new trends, and opportunities you should be aware of without setting up custom alerts or monitoring dashboards manually.
Cross-Platform Attribution
GA4 tracks the same user across web and app sessions, attributing conversions to the right touchpoints in a cross-platform customer journey. Attribution models include data-driven attribution as the default, which uses machine learning to distribute credit across touchpoints based on their actual contribution rather than applying a fixed rule like last-click. Google Ads conversion data syncs bidirectionally so GA4 conversions feed back into campaign optimization.
Google Search Console Integration
Connecting Search Console to a GA4 property adds an organic search report that shows which queries drove sessions, what landing pages they hit, and what users did after arriving. This connects the query-level data from Search Console with the behavioral data from Analytics in a single interface, removing the need to cross-reference two separate dashboards for organic search analysis.
BigQuery Export
GA4 includes a free daily BigQuery export that writes raw, unsampled event-level data to Google Cloud. This removes the data retention limit and sampling constraints of the standard GA4 interface, giving teams full historical data for custom SQL analysis, training machine learning models, or feeding business intelligence tools. The export is available to any GA4 property without a paid Analytics 360 contract.
Pricing
| Feature | Google Analytics 4 (Free) Free | Analytics 360 (Enterprise) Custom (enterprise contract) |
|---|---|---|
| Web and App Tracking | ✓ | ✓ |
| Standard Reports | ✓ | ✓ |
| Exploration Reports | ✓ | ✓ |
| Machine Learning and Predictions | ✓ | ✓ |
| Google Ads Integration | ✓ | ✓ |
| Search Console Integration | ✓ | ✓ |
| BigQuery Export | ✓ | ✓ |
| Data Retention | 14 months max | 50 months |
| Sampling | Applies on large reports | Unsampled |
| SLA and Dedicated Support | ✗ | ✓ |
| Advanced Funnel Reporting | ✗ | ✓ |
| Intraday BigQuery Export | ✗ | ✓ |
Who it is for
GA4 is the baseline analytics tool for understanding how users find and interact with a site or app. At zero cost for standard use, there is no rational argument for not having it installed. The machine learning features alone justify setup time even for small properties.
The native Google Ads integration makes GA4 the most efficient way to share conversion data with campaigns and build high-intent remarketing audiences. Predictive audiences based on purchase probability feed directly into Smart Bidding, which improves campaign ROI without manual segment management.
The free BigQuery export gives analysts unsampled, row-level event data for SQL analysis, custom attribution modeling, and machine learning experiments. GA4 plus BigQuery replaces the expensive Analytics 360 contract for teams comfortable with Google Cloud tooling.
Verdict
Google Analytics 4 is the most capable free analytics tool available and the correct default for any web property. The event-based model, predictive ML, and Google ecosystem integrations set a standard that paid alternatives struggle to match at any price. The learning curve is real but the investment is justified by the breadth of what you get at no cost.
Frequently asked questions
Is Google Analytics 4 really free?
Yes. GA4 is free for standard use with no hit limits, no per-session charges, and no per-property fees. The paid tier, Analytics 360, is an enterprise contract that adds unsampled reporting, longer data retention (50 months), an SLA, and advanced features like intraday BigQuery export. Most websites and apps have no reason to need Analytics 360.
What happened to Universal Analytics?
Google shut down Universal Analytics in July 2023. Standard UA properties stopped processing new data first, followed by 360 properties. GA4 is the only supported version of Google Analytics now. If you are still referencing UA reports, that data is historical only and the property is no longer collecting.
Does GA4 work with Google Ads?
Yes, and the integration is tighter than it was with Universal Analytics. GA4 conversions feed directly into Google Ads smart bidding. Audiences built in GA4, including predictive audiences based on purchase probability, can be pushed to Google Ads for remarketing. GA4 also imports Google Ads cost data so you can see CPC, impressions, and spend alongside behavioral data in the same interface.
What is data sampling and how does it affect GA4 reports?
Sampling occurs when GA4 has too many events to process a report query in real time, so it analyzes a subset and extrapolates the result. In standard GA4 reports, sampling thresholds apply for complex explorations on large properties. The BigQuery export bypasses sampling entirely since queries run against the raw event-level data rather than the aggregated interface layer.
Can I use GA4 data in Looker Studio or other BI tools?
Yes. GA4 has a native Looker Studio connector that pulls data into reports and dashboards without extra cost. For more advanced BI use, the BigQuery export lets you query raw GA4 data from any tool that connects to BigQuery: Looker, Tableau, Power BI, and others. Third-party tools like Reporting Ninja and Octoboard also include GA4 connectors for agency reporting workflows.