Understanding GA4: the most important metrics for SMEs

You have Google Analytics 4 on your website, you log in - and you're faced with a dashboard full of terms that no one has explained. If that's how it feels, you're not alone. Most SME owners I speak with look in once or twice and then close it again. A pity, because a few select GA4 metrics tell you very precisely whether your website is working or merely existing. In this post I'll show you which numbers those are and how to read them correctly - without jargon.

Important up front: you don't have to understand everything. You need a handful of metrics that fit your goals. The rest you can happily ignore.

Why GA4 feels different from before

If you knew the old Google Analytics, GA4 feels unfamiliar at first. The reason: GA4 no longer thinks in page views, but in events. Every click, every scroll, every page view is an event. That sounds technical, but it has a practical advantage - you see not just that someone was there, but what they did.

For day-to-day use this means: don't be put off by the flood of terms. The following metrics are entirely enough for a well-founded assessment.

The metrics that really count

Here are the metrics I look at first for an SME:

• Users: how many different people were on your site. The most honest number for your reach.
• Sessions: how often your site was visited. One person can trigger several sessions - for example in the morning and the evening.
• Engagement rate: the share of visits in which someone actually did something. GA4's replacement for the old "bounce rate" - and considerably more meaningful.
• Average engagement time: how long people actively linger on your site. Reveals whether your content grips or bores.
• Conversions (key events): the actions that bring you money - contact form submitted, call clicked, appointment booked.

Together, these five numbers tell a whole story: how many people come, how much it interests them, and how many end up becoming customers.

Engagement rate instead of bounce rate

One of the most common confusions: in GA4 there's no longer a classic bounce rate in the foreground. Instead you see the engagement rate. An "engaged session" is a visit that lasts longer than ten seconds, triggers a conversion, or includes at least two pages.

The difference matters. Previously, a visitor who read only one page and left satisfied counted as a "bounce" - even though they may have found exactly the phone number they were looking for. The engagement rate measures genuine interest instead of mere click paths. A rate of 60 percent or more is a good sign for most SME sites.

Where do your visitors come from?

Just as important as the number is the origin. In the "Acquisition" report you see through which channels people find you:

• Organic search: found via Google - usually your most valuable channel.
• Direct: address typed in directly or saved as a bookmark.
• Referral: via a link on another website.
• Social: from Instagram, LinkedIn, Facebook and the like.

Whoever looks closely here makes better decisions. If almost everything comes from organic search, it's worth looking at your visibility on Google - you'll find concrete tips on that in my other posts. If social media brings hardly any visits, you might save yourself effort that's better spent elsewhere.

Conversions: the only number that counts

In the end it's not about clicks, but about results. That's why my urgent advice: define your key events in GA4. Consider what makes a visit valuable for your business - a submitted contact form, a click on your phone number, an enquiry by email - and mark exactly that action as a conversion.

Only then does GA4 become a real tool. You no longer see just "300 visitors", but "300 visitors, 12 of them enquiries". That's the number that really counts. Without this setup, even the prettiest report remains statistics with no connection to your revenue.

What you shouldn't fall for

Two things regularly lead SMEs astray. First: over-interpreting small numbers. If your site has ten visits a day, a day with two visits says little. Look at periods of four weeks and up, not at single days.

Second: blind comparisons. There's no universal "good engagement time" - a blog article has different values than a contact page. Compare yourself above all with yourself: if your numbers improve over the months, you're on the right track.

Start small, stick with it

You don't have to master GA4 in one afternoon. Log in once a month, look at these five metrics and ask yourself: are more people coming? Are they staying longer? Are more enquiring? If you can answer these three questions, you're already using GA4 better than most.

If you like, I'll set up GA4 cleanly for your business - including the right conversions and a short, understandable report that you'll actually read. Just get in touch via the contact form, and we'll look at your numbers together.