How to Use Google Analytics 4 to Actually Understand Your Customers

Google Analytics 4 launched as the mandatory replacement for Universal Analytics in 2023, and three years later a large proportion of businesses are still either not using it correctly or actively avoiding it because the interface is genuinely confusing. That's an expensive gap: without accurate data, you're making marketing decisions by intuition. Some of those decisions will be right. Most won't. Here's how to use GA4 in a way that actually informs better decisions.

The Mindset Shift GA4 Requires

Universal Analytics was built around sessions and pageviews. GA4 uses events to represent measured interactions, such as page views, scrolls, clicks, form submissions, and purchases, with associated parameters. Some events are collected automatically; others need configuration. Check that the setup measures the interactions your business actually needs.

The most important mental model shift: stop looking at raw traffic numbers and start looking at the path from first visit to conversion. GA4 is designed to show you that journey — if you set it up correctly.

The Five Events You Actually Need to Track

GA4 auto-collects several events by default (page_view, session_start, user_engagement). But the events that drive business decisions are the ones you define. For most businesses, these five are the essential starting point:

• generate_lead — fires when a contact form is submitted. This is your primary conversion event if you're a service business. Set this up in GA4's event creation tool or via Google Tag Manager.
• phone_call_click — fires when a user clicks a phone number link (tel: links). Often one of the highest-converting actions on a local business website, and frequently untracked.
• scroll — GA4 enhanced measurement can record the first time 90% of a page becomes visible. Enable Scrolls in your data stream settings; additional depth thresholds need custom tracking.
• file_download — if you have PDFs, brochures, or case studies available for download, tracking these tells you which content is driving engagement with high-intent prospects.
• purchase — for e-commerce, this is non-negotiable. GA4's e-commerce events require implementation but provide the clearest picture of what's driving revenue.

The Three Reports Worth Bookmarking

Start with reports that connect traffic and page use to business outcomes. These three are useful places to look:

Acquisition Overview

Reports → Acquisition → Traffic acquisition. This shows where measured visits come from — organic search, direct, paid, social, email, and referral. Compare sessions with key events and business value. As an illustration, a channel generating many visits but few qualified leads may deserve a different budget from one bringing fewer visits and more sales. Account for acquisition costs and lead quality too.

Pages and Screens

Reports → Engagement → Pages and screens. Sort by views to see your most-visited content, then review engagement time and the actions visitors take. Interpret those metrics against the page's purpose: a quick visit that answers a question or leads to a call can be successful, while a long visit may reflect confusion.

Conversions by Source

Review attribution reports to understand which measured marketing interactions contribute to key events or conversions. Data-driven attribution can distribute credit across measured touchpoints instead of assigning it all to the last click. Interpret that model alongside the data GA4 can actually observe; it may not capture the full customer journey.

"The purpose of analytics isn't to generate reports. It's to answer questions that lead to better decisions. Start with the decision you need to make, then find the data that informs it."

Setting Up Conversion Tracking Correctly

Mark the events that represent business value as key events in GA4. In Admin → Data display → Events, find an existing event in Recent events and select its star icon, or mark a new event as a key event when you create it. A Google Ads conversion can then be created from a key event when the accounts are linked. Google's key event setup guide explains the current controls and permissions.

A critical nuance: make sure your conversion events are only firing on actual conversions, not on every visit to a page. If you're tracking a "thank you" page view as a conversion, verify that the thank you page is only reachable after a genuine form submission — not directly accessible via URL or browser refresh. A wrongly configured conversion event will over-report, and decisions made on inflated conversion data will be wrong in the opposite direction.

Check Google's enhanced measurement event reference before adding custom events, so you do not duplicate interactions GA4 already collects.

The Weekly Check-In Habit

Analytics only creates value if you act on it. Build a simple weekly check-in habit:

• Is organic traffic trending up, flat, or down versus the prior 4 weeks?
• Which pages are generating the most conversions? Is that consistent with where you're investing content effort?
• Are there traffic sources performing significantly better or worse than last week? If so, why?
• Are conversion rates stable? A sudden drop in conversion rate is a signal something on the site has changed — a broken form, a new page, a layout change that's creating friction.

A short weekly review with focused questions can help you identify what needs closer investigation. The goal is to make data-informed decisions faster — not to become an analyst.