Google Analytics 4 (GA4) is Google’s free analytics platform for understanding how people find and use your website or app. It replaced Universal Analytics, which stopped processing data in 2023. GA4 uses an event-based model, a new interface and more privacy-focused measurement. For beginners, these changes can make it feel confusing at first.
This guide explains the essentials of GA4 in simple terms: how it collects data, which reports matter most and how to use insights to improve your marketing.
How GA4 Is Different
| Universal Analytics (old) | Google Analytics 4 |
|---|---|
| — | — |
| Goals | Key events (conversions) |
| Limited privacy controls | More privacy-focused, consent mode support |
Key Concepts
Events
Every interaction is an event: page views, scrolls, clicks, file downloads, video plays, form submissions and purchases.
Engaged sessions
A session counts as engaged if it lasts longer than a set time (by default 10 seconds), includes a key event or has at least two page views.
Engagement rate
The percentage of sessions that were engaged. It is essentially the opposite of bounce rate in GA4.
Key events
Previously called conversions, key events are important actions you mark as valuable, such as sign-ups or purchases.
Users
GA4 reports on total users, new users and active users, using various identifiers to estimate unique people.
Step 1: Set Up GA4
- Create a Google Analytics account and a GA4 property
- Add a web data stream with your website URL
- Install the measurement tag using your site platform, a WordPress plugin or Google Tag Manager
- Enable enhanced measurement to automatically track scrolls, outbound clicks, site search, video engagement and file downloads
- Verify data in the Realtime report
Step 2: Configure Important Settings
- Set your reporting time zone and currency
- Increase data retention for explorations if needed
- Exclude internal traffic, such as your own visits
- Link Google Search Console and Google Ads
- Configure consent mode if you use a cookie banner
Step 3: Mark Key Events
Decide which actions matter most for your business, such as generate_lead, sign_up or purchase. Create or identify the event and mark it as a key event. This lets you see which channels and pages drive valuable actions.
Important GA4 Reports
| — | — |
|---|---|
| Traffic acquisition | Sessions by channel, source and medium |
| Demographics and tech | Location, language, device and browser |
Step 4: Understand Traffic Channels
GA4 groups traffic into default channels such as Organic Search, Direct, Referral, Organic Social, Paid Search, Email and Display. Use UTM parameters on your campaign links so GA4 can categorise traffic correctly.
Step 5: Use Explorations
Explorations let you build custom analyses:
- Free form: create tables and charts with chosen dimensions and metrics
- Funnel exploration: see where users drop off in a process
- Path exploration: understand the routes users take
- Segment overlap: compare audience segments
Start with simple questions, such as “Which landing pages from organic search lead to newsletter sign-ups?”
Step 6: Turn Data into Action
| — | — |
|---|---|
| A blog post gets traffic but low engagement | Improve intro, readability and intent match |
Privacy and Consent
Follow applicable privacy laws and your own privacy policy. Use a consent banner where required and configure consent mode so tags respect users’ choices. Avoid collecting personally identifiable information in analytics.
Common Beginner Mistakes
- Installing the tag twice, which inflates data
- Not marking key events
- Forgetting to exclude internal traffic
- Not using UTM parameters for campaigns
- Trying to replicate every old Universal Analytics report instead of learning GA4’s approach
Real-World Example
A small online store installed GA4, marked purchases and newsletter sign-ups as key events and linked Search Console. The Traffic acquisition report showed that Pinterest brought fewer users than Instagram but a higher conversion rate. Landing page data revealed that a gift guide drove many purchases. The owner created more gift guides and invested more time in Pinterest, increasing sales without increasing ad spend.
Frequently Asked Questions
Is GA4 free?
Yes, the standard version is free. An enterprise version is available for large organisations.
Where is bounce rate in GA4?
Bounce rate is available but GA4 emphasises engagement rate. You can add bounce rate to reports through customisation.
How long does GA4 take to show data?
Realtime data appears quickly, while standard reports may take up to a day to process.
Do I need Google Tag Manager?
Not necessarily, but it makes managing tags and custom events easier.
Why is GA4 data different from Search Console?
They measure different things: GA4 tracks sessions on your site, while Search Console tracks search impressions and clicks.
What are key events?
Important actions you mark as valuable, previously called conversions.
Conclusion
GA4 gives you a detailed view of how people discover and use your website. Set it up correctly, enable enhanced measurement, mark key events, use UTM parameters and focus on the reports that answer your business questions. Turning these insights into action helps you invest your marketing time and money where it matters most.
