The forced migration to GA4 was chaotic, and most teams spent 2023–2024 just trying to maintain parity with the Universal Analytics reports they were used to. Now that the dust has settled, it’s worth stepping back and asking: which metrics in GA4 should actually drive decisions, and which are noise?

The Metrics That Have Changed Meaning

Bounce rate is gone. GA4 replaced it with Engagement Rate — the percentage of sessions that lasted more than 10 seconds, had a conversion event, or had more than one page view. This is genuinely better. A user who lands on a page, reads it thoroughly, and leaves having found what they needed was counted as a “bounce” in UA. In GA4, they’re counted as engaged. Track engagement rate instead.

Sessions are measured differently. GA4 uses an event-based model rather than session-based, which means session counts often look lower than UA. Don’t compare the numbers directly — they’re measuring different things.

The Reports Worth Building

Landing Page Performance

Build a custom report showing landing page → sessions → engaged sessions → engagement rate → key events (leads, purchases, sign-ups). This tells you which entry points are working and which need attention. Filter to organic traffic only for an honest read on SEO performance.

Conversion Path Analysis

The Advertising → Attribution → Conversion paths report in GA4 is genuinely useful. It shows the actual sequence of touchpoints before conversion, not just the last click. Use this to identify which channels assist conversions even if they don’t get the last-click credit.

Cohort Analysis for Retention

If you have an e-commerce site or subscription product, the Retention report shows you when users return after first acquisition. Useful for understanding the long-term value of different acquisition channels.

What to Ignore

Real-time reports are fun but rarely drive decisions. Check them when you launch something, then move on. Default channel groupings need to be customised for your business — GA4’s out-of-the-box definitions often misclassify traffic. And the default Acquisition overview is too high-level to be actionable; build a custom report instead.

Setting Up Meaningful Events

GA4’s event-based model is its biggest strength, but only if you define meaningful events. At minimum: form submissions, phone number clicks, key page views (pricing, contact, demo), scroll depth milestones on key content pages, and outbound link clicks to high-value destinations. Set these up in GTM, not native GA4 — it gives you more control and easier debugging.

The Honest Assessment

GA4 is a more powerful analytics platform than Universal Analytics. It’s also significantly harder to use out of the box. The teams getting value from it are the ones who’ve invested in custom configuration — custom events, custom reports, proper attribution setup, and a clear agreement on which metrics matter before looking at data. If you haven’t done that work yet, most of the numbers you’re looking at are misleading you.