Back then, when Google announced the death of Universal Analytics, I was as confused as you are now. It feels like having to learn from the beginning again. But after a whole year of "struggling", I realized that Google Analytics 4 (GA4) is not scary at all, on the contrary, it is an extremely powerful weapon.
This article is all about my real-life experience, a Google Analytics 4 GA4 handbook that guides you from the beginning to master this tool. I will write in a real person's style, straight to the point, absolutely no fluff in empty theories.
What is GA4 and Why Do You Have to "Get Close" Immediately?
GA4 (Google Analytics 4) is the latest generation of Google's data analytics platform, using an event-based measurement model instead of sessions. This tool helps you comprehensively understand user behavior on both website and mobile application platforms.
Forget Universal Analytics, GA4 is a whole new game
Switching from Universal Analytics to GA4 isn't just about updating the interface, it's about completely changing the measurement mindset from "page views" to "specific engagement behaviors."
In the past when we used Universal Analytics, we were too familiar with counting the number of people visiting the page. But at the present time, that approach has revealed many limitations. So what is the nature of GA4? It is an extremely intelligent and flexible user behavior analysis system.
You cannot patch old data to the new system. Instead, be prepared to get used to a completely different structure. Understanding this nature contributes to improving the efficiency of data analysis for your business.
Event-based data model: The core difference compared to UA
In GA4, every user interaction (such as scrolling, clicking, watching a video) is recorded as an independent "event", making the data much more detailed and flexible.
Event-based data is at the heart of this new system. If Universal Analytics lumps everything into a rigid "session", GA4 breaks down every single customer action.
For example, a customer clicks the "Buy Now" button, scrolls past 50% of an article, or downloads a report file. All are events. Thanks to that, you know exactly where they are having problems, thereby providing website optimization solutions that are closest to reality.
The "money-making" benefits of GA4 that web developers like me cannot miss
The benefits of Google Analytics 4 lie in cross-device tracking, behavioral predictive AI integration, better privacy management, and provision of insightful custom reports.
From experience implementing projects at Pham Hai, we realize that the benefits of Google Analytics 4 are truly outstanding. The first is the ability to seamlessly monitor multiple channels. Customers view the product on their phone and then buy it on their laptop, the system still recognizes that it is a single person.
Second, it respects privacy (Privacy-first) – a vital factor when third-party cookies are tightened. Of course, for the measurement tool to be effective, you need to have an accurate traffic pulling strategy. For newbies, mastering Detailed keyword research is an important foundation for attracting the right set of potential customers.
Quick and Concise Instructions for Installing GA4 (Even If You're Blind to Code)
You can install GA4 by creating a live account, using the flexible tag manager, or upgrading from the old Universal Analytics system depending on your actual needs.
Method 1: Set up a brand new GA4 account for beginners
To set up a GA4 account, go to the Google Analytics home page, select "Create account", fill in the business name, create GA4 properties and set up a data stream (Data Stream).
The most basic way to install Google Analytics 4 is to operate directly from the beginning. Here are the steps I usually do:
- Bước 1: Truy cập analytics.google.com và đăng nhập bằng tài khoản Google.
- Bước 2: Bấm vào "Tạo tài khoản" (Create Account) và nhập tên công ty của bạn.
- Bước 3: Chuyển sang bước tạo thuộc tính GA4 (Property). Nhớ chọn đúng múi giờ và loại tiền tệ (VNĐ).
- Bước 4: Thiết lập luồng dữ liệu bằng cách nhập URL website. Hệ thống sẽ tự động sinh ra mã theo dõi để bạn gắn vào thẻ
<head>của web.
Method 2: Install GA4 via Google Tag Manager - "True love" for fellow Marketers
Using Google Tag Manager (GTM) helps you attach GA4 code without directly intervening in the website source code, easily managing and adding or removing event tags later.
At Pham Hai, we always recommend that customers install GA4 via Google Tag Manager. This method is much safer and saves time. You just need to create a new tag in GTM, choose the tag type "Google Analytics: GA4 Configuration" (or Google Tag according to the updated 2026 interface).
Then you paste in the Measurement Code, select the "All Pages" trigger, and click Publish. Finished! You completely control the system without needing to ask a programmer every time you want to measure a new button.
Method 3: Upgrade directly from Universal Analytics (for those who want to keep the old structure)
Use the Setup Assistant tool in Universal Analytics Administration to automatically create a parallel GA4 property based on the old settings.
Although Universal Analytics stopped processing data a long time ago, many of you still keep your old account to review the history. If you belong to this group, go to the Administration section of your old account, find "GA4 Setup Assistant".
Click the "Get Started" button, Google will automatically clone the old structure to a brand new Google Analytics account. However, based on the latest updates, I recommend that you still review the entire event because the recording mechanisms of the two sides are completely different.
Accidentally deleted the code? How to find the Measurement ID in 30 seconds
To find the measurement code again, go to Administration > Data Flow > Select your website. The code will be in the right corner of the screen, always starting with the letter "G-".
Sometimes changing the web interface and losing the measurement code is a common occurrence. Don't panic! You just need to go to the main interface, look down at the bottom left corner and click on the "Administration" gear icon.
Next, find the "Data Streams" section, click on your website name. You'll immediately see a string of characters starting with "G-" (for example, G-123456789). Copy that code and paste it back into the web and the system will continue to collect data normally.
Getting Familiar with the GA4 "Dashboard": How to Read the Most Important Reports
The effective way to read GA4 reports is to focus on 5 main groups: Realtime, Traffic Acquisition, Engagement, Monetization and Landing Page to comprehensively grasp the customer journey.
Realtime report: See the "heat" of your website right at the moment of speaking
Realtime reports show the number of users visiting the website in the last 30 minutes, their geographical location and the events they recently completed.
Realtime reports are the things I open the most every time I run an email marketing campaign or create a PR article. It shows you instantly how many people are online on the site.
In the updated interface in early 2026, this GA4 report also clearly shows what users are interacting with in the form of visual cards. It's extremely useful for quickly testing whether the event codes you just attached are working as expected.
Traffic Acquisition Report: Where do your customers come from?
The Traffic Acquisition report analyzes the origin of traffic, helping you know whether customers come from organic search, social networks or paid advertising.
This is the most accurate "disease catching" report for marketing campaigns. The Traffic Acquisition report provides detailed statistics on the sources that attract visitors to the website. You will immediately know which channels are bringing real results.
If you see that paid advertising sources yield high conversion rates, you can confidently increase your budget. To optimize this process, reading Google Ads guide to running ads from scratch will help you build a smart budget allocation mindset and avoid waste.
Engagement Report: What do they do, what pages do they view the most?
The Engagement report measures average interaction time, triggered events, and the most viewed pages on your website.
The Engagement report directly answers the question: "Is my content strong enough to retain customers?". Here, you will get acquainted with the concept of "Engaged Sessions".
It only counts people who stay on the website for more than 10 seconds, view 2 or more pages, or have a conversion event. I often use this report to find the blog posts with the longest reading time, then analyze and duplicate the formula for writing that article for other categories.
Monetization Report: Is your website "making money"?
The Monetization report tracks e-commerce revenue, number of shoppers, advertising revenue, and sales performance of each specific product.
This area was created specifically for you to create e-commerce sites. The Monetization report not only shows total revenue but also shows which products are the "stars" and which discount codes are applied the most.
In particular, with the Cross-channel budgeting update launched in early 2026, Google has allowed you to simulate and predict future revenue based on current advertising spend data. This is a big step forward in supporting powerful ad optimization.
Landing Page Report: Which page is the "front page" that attracts the most visitors?
The Landing Page report statistics the performance of the first pages users visit when entering your website, helping to evaluate first impressions.
If the "front" is bad, customers will turn around immediately. The Landing Page report helps you detect pages with high traffic but low engagement rates.
From this data, you know where you need to intervene: edit the title to be more sensational, change the position of the Call-to-action button or increase page loading speed. I always make it a priority to check this report weekly so I don't miss any opportunities to improve user experience.
Comparing GA4 and Universal Analytics: How are "Old" and "New" different?
The biggest difference between GA4 and Universal Analytics is that it measures by "Events" instead of "Sessions", combines Web and App data, and eliminates outdated metrics.
| Comparison criteria | Universal Analytics (Old version) | Google Analytics 4 (2026 Version) |
|---|---|---|
| Mô hình dữ liệu | Based on Sessions and Page Views | Event-based flexibility |
| Chỉ số tương tác | Bounce Rate | Engagement Rate |
| Nền tảng đo lường | Separate Website and App | Merge Web and App on the same property |
How have the indicators in GA4 changed? (Goodbye Bounce Rate, hello Engaged Sessions)
GA4 eliminates the old-style Bounce Rate, instead using Engagement Rate and Engaged Sessions to evaluate traffic quality.
In the past, my boss often asked "Why is the Bounce Rate of this page so high?". But now that thinking has changed. Indicators in GA4 focus on positive values instead of negative values.
Engagement Rate is the opposite of the old Bounce Rate. It tells you exactly what percentage of customers actually care about and act on the content. Honestly, I like this approach better because it truly reflects the efforts of genuine content creators.
Account interface and structure: Everything has been rearranged
The GA4 account structure is simpler, removing the "View" level of the UA, retaining only the Account and Property levels containing the Data Flows.
If you are familiar with the Account > Property > View structure of Universal Analytics, the new interface will make you a bit confused in the first few days. GA4 boldly removed the View level completely.
Instead, a GA4 property can contain many different data streams. For example, you can set up one stream for the web, one stream for the iOS app, and one stream for the Android app. All of this data flows to a single place, helping you manage more centrally and neatly.
Outstanding Features Turn GA4 Into An Effective "Assistant".
GA4 stands out with its predictive AI capabilities, cross-platform tracking (Web + App), and an Explore tool that allows for in-depth funnel analysis reports.
Artificial Intelligence (AI) and Machine Learning: "Oracle" predicts user behavior
GA4 integrates AI and Machine Learning to automatically detect anomalies in data and provide predictive metrics such as purchase probability.
This is what I like most about the features of Google Analytics 4. Thanks to artificial intelligence, the system can automatically turn on a warning if today's revenue suddenly drops compared to last week's average.
What's more, the 2026 "Generated Insights" feature lets you ask questions directly in natural language. AI automatically analyzes and returns the reason why traffic fluctuates, saving you hours of looking at charts.
Multi-channel tracking (Web + App): A 360-degree view of the customer journey
GA4 uses the Google Analytics for Firebase SDK to collect app data and combine it seamlessly with web data, creating a unified cross-platform customer profile.
Previously, to measure web and apps, you had to use two patchwork tools. Now the multi-channel tracking feature has completely solved this problem.
You absolutely know a customer viewed an ad on the web, installed an app via the Google Analytics SDK for Firebase, and ultimately closed the sale on a phone. This journey is seamlessly connected thanks to the User-ID feature, which completely eliminates data duplication that causes reporting errors.
Analyze and customize advanced reports with "Explore"
The Explore tool in GA4 provides flexible reporting templates such as Funnel exploration or Path exploration that are extremely intuitive.
The GA4 user guide will be greatly flawed if it ignores the Explore area. Here, you can freely drag and drop variables to create a report with a personal touch.
For example, I often create a payment funnel to see if customers "drop out" at the information filling step or the card swiping step. For the data in this funnel to be truly accurate, properly configuring conversion events is required. If you are running ads, please see Google Ads Conversion tracking installed correctly to ensure the data flow to GA4 is always the cleanest and most accurate.
Switching to GA4 can be a bit overwhelming at first, I admit. But don't try to learn everything at once. Start by installing the correct measurement code, then spend 15 minutes each day looking at the Acquisition and Engagement reports. Gradually, you will see that GA4 is truly a powerful tool that helps you understand users and optimize your website much more effectively than old versions.
Which report in GA4 do you find the most "difficult"? Please leave a comment below, let's dissect it together!
Note: The information in this article is for reference only. For the best advice, please contact us directly for specific advice based on your actual needs.
