When you open GA4 (Google Analytics 4), the first number you see is "Active Users." But many people wonder: "How is this different from the old Unique Users (UU)?" or "How should I distinguish this from Total Users?"
Active Users is the most fundamental user metric in GA4, and it is essential for measuring your site's health and the effectiveness of marketing initiatives. This article covers everything from the definition of active users to the differences with Total Users, sessions, and pageviews, how to check them in GA4, and actionable strategies to increase active users — all explained in a beginner-friendly way.
Active Users is a metric that represents the number of users who visited a website or app within a specific period and demonstrated a certain level of engagement (action). In GA4, the number displayed simply as "Users" actually refers to Active Users.
In the legacy UA (Universal Analytics), every user who accessed the site was counted, even those who left immediately. GA4's Active Users, however, are filtered to include only those who took some meaningful action. In other words, it is a metric that emphasizes the "quality" of access rather than the "quantity."
To be counted as an Active User in GA4, a user must meet at least one of the following conditions.
First, an engaged session occurred. An engaged session is one where the user stayed on the site for more than 10 seconds, a conversion event was triggered, or 2 or more pages were viewed.
Second, a first_visit event (for websites) or first_open event (for apps) was triggered. This means first-time visitors are automatically counted as active users.
Third, the engagement_time_msec parameter was recorded. This occurs when the site was displayed in the foreground for 1 second or more.
Active Users are named differently depending on the measurement period. DAU (Daily Active Users) refers to the daily count, WAU (Weekly Active Users) to the 7-day count, and MAU (Monthly Active Users) to the 28- or 30-day count. GA4's Reports Snapshot displays active user counts for the past 1 day, 7 days, and 30 days by default, making it easy to track these trends at a glance.
GA4 has several user-related metrics that are easy to confuse. Let’s clarify the differences between Active Users and other key metrics.
Total Users is the aggregate of all unique users who visited the site at least once during a specified period, including users who opened a page and closed it immediately. Active Users, on the other hand, are limited to users who showed a certain level of engagement, so Total Users is typically higher than Active Users.
If there is a large gap between these two metrics, it means many users arrive at the site but leave without showing interest. This gap tends to be prominent, for example, when running low-cost display ads that drive large volumes of traffic.
"Unique Users (UU)" used in the legacy UA referred to the total number of individual visitors. In GA4, "Total Users" is the concept closest to UU, while "Active Users" is a narrower subset that includes only those who engaged. Therefore, directly comparing UA's UU with GA4's Active Users will show lower numbers in GA4.
Sessions represent the "number of visits to the site," while pageviews (views) represent the "number of times pages were displayed." Both are incremented each time the same user takes an action. Active Users, however, count the same person only as 1, no matter how many times they visit in a day. Therefore, the typical relationship is "Active Users ≤ Sessions ≤ Pageviews."
New Users is the count of users who visited the site for the first time during a specified period. Active Users include both new users and returning visitors. By comparing New Users to Active Users, you can understand what proportion of your total visitors are new, which helps in planning acquisition and retention strategies.
GA4 offers several ways to check Active Users. Choose the method that best fits your purpose.
After logging into GA4, select "Reports" from the left menu. The "Reports Snapshot" screen displays Active Users by default, showing the count and trend graph for the past 28 days. You can change the period using the date selector in the upper right. This is the quickest way to get a snapshot of your site's overall performance.
Navigate to Reports > User attributes > User attributes detail from the left menu to view Active Users by country, region, age, and gender. Understanding which demographics make up your audience helps determine the direction of content creation and marketing strategies.
For deeper analysis, use the Explore feature from the left menu. Create a Free-form report, select "Active Users" as the metric, and combine it with dimensions such as "Month" or "Device category" to analyze monthly or device-specific Active User trends that standard reports can't provide.
Note that in Exploration reports, the metric is labeled "Active Users" rather than just "Users" as in standard reports. Be careful not to confuse the two.
Using "Cohort exploration" in GA4's Explore feature, you can see how many active users who first visited in a given period continue to use the site over time. For example, out of 100 users who first visited in January, how many returned in February and March? This retention analysis is invaluable for evaluating your engagement strategies.
To grow Active Users, you need to approach from both angles: acquiring new users and encouraging repeat visits from existing users.
Acquiring new users through search engines is the most fundamental way to increase Active Users. Consistently create high-quality content aligned with target keywords and aim for top rankings. Rewriting existing articles, optimizing titles and meta descriptions, and improving site structure are all effective tactics. Track the Organic Search active user trend in GA4's Traffic acquisition report to measure results.
Since Active Users is a metric based on engagement, creating content that keeps visitors interested and reading is crucial. Techniques such as addressing the reader's problem upfront, using clear heading structures, and incorporating visuals and concrete examples can improve dwell time and page navigation. This also improves the ratio of Active Users to Total Users.
Relying solely on new user acquisition will eventually plateau your Active User growth. Getting existing users to return helps maintain and expand MAU (Monthly Active Users). Regular social media posts, newsletters with new article highlights, push notifications, and official LINE accounts are all effective retention tools.
If a site loads slowly, users leave before the page even renders, and no engagement occurs. Improving Core Web Vitals and implementing mobile-friendly designs ensures users can browse content without friction, increasing the proportion of visitors counted as Active Users.
If you are driving traffic through ads but targeting is off, Total Users may increase while Active Users don't. Review your ad targeting and messaging to attract users who are genuinely interested in your content. Check the gap between Total Users and Active Users by channel in GA4, and improve ad campaigns for channels with large discrepancies.
There are several important considerations when working with Active Users in GA4.
First, GA4 data has a latency of approximately 24 to 48 hours. You cannot check today's campaign performance by Active Users on the same day, so use Real-time reports for immediate assessments.
Second, sampling may be applied when data volumes are large. Sampled data may not fully reflect the complete picture, so extra caution is needed for high-traffic sites.
Third, GA4 uses cookies and device IDs to identify users, so the same person using different browsers or devices may be counted as separate users. Enabling Google Signals can improve cross-device identification accuracy.
Finally, the "Users" metric in standard reports and "Active Users" in Exploration reports are the same metric but have different labels. Selecting "Total Users" in Explorations will display a different value from Active Users.
Active Users is a fundamental metric in GA4 representing "users who showed interest and took action on your site." The "Users" figure displayed in GA4's standard reports is Active Users, and it serves as a central metric for measuring traffic performance and campaign effectiveness.
While Total Users counts all visitors, Active Users are limited to those who engaged, making it ideal for gauging traffic quality. Since sessions and pageviews measure from different perspectives, combining these metrics for multi-dimensional analysis is important.
To increase Active Users, a multi-pronged approach is required: expanding new traffic through SEO, improving content quality, promoting repeat visits via social media and email, and improving site speed. Start by checking the Reports Snapshot in GA4 to understand your current Active User performance and take the first step toward improvement.
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