Google Analytics 4 for Small Businesses: What to Track and Why

Google Analytics 4 is installed on nearly every website we build. It takes about two minutes to add the tracking code, and most business owners never look at it again. That is a problem, because GA4 is quietly collecting data that could reshape how you spend your marketing budget, what pages you prioritise, and where your next customers are actually coming from.

We are not going to pretend GA4 is intuitive. The interface is cluttered, the terminology has changed from the old Universal Analytics, and half the default reports are irrelevant to a small business. But there is a core set of reports and metrics that genuinely matter. Once you know where to look, you can make better decisions in ten minutes a week than most businesses make in a quarter.

This guide is written for Irish SME owners and marketing managers who already have GA4 installed but are not sure what to do with it. We will walk through what GA4 actually measures, the reports that deserve your attention, how to set up key events (formerly called conversions), and the most common mistakes we see across client accounts.

What Google Analytics 4 actually measures

Before diving into reports, it helps to understand how GA4 thinks about your website visitors. The old Universal Analytics was built around sessions and pageviews. GA4 is built around events and users.

Every interaction on your website is an event. A page load is an event. A scroll is an event. A click on your phone number, a form submission, a video play - all events. GA4 collects these automatically for the basics (page views, scrolls, outbound clicks, file downloads, site search) and lets you define custom events for anything else.

This is actually good news for small businesses. It means you can track exactly the actions that lead to revenue - phone calls, quote requests, booking form submissions - without needing a developer to write custom code for each one.

The key concepts you need to know:

• Users: Individual people visiting your site (tracked via cookies and, if signed in, user IDs)
• Sessions: A group of interactions within a given time frame. A session starts when someone arrives and ends after 30 minutes of inactivity.
• Events: Any interaction - from a simple page view to a completed purchase
• Key Events: Events you have flagged as important to your business (the new name for conversions in GA4)
• Engagement Rate: The percentage of sessions that lasted longer than 10 seconds, had a key event, or had 2+ page views

The 6 Google Analytics reports that actually matter

GA4 has dozens of reports. Most of them are noise for a small business. Here are the six we check for every client, and what each one tells you.

1. Realtime report

Found under Reports > Realtime, this shows you who is on your site right now, where they came from, and what pages they are viewing. It is not useful for strategic decisions, but it is invaluable for one thing: verifying that tracking works.

Whenever we launch a new website or set up a new key event, the first thing we do is trigger it ourselves and check the Realtime report to confirm the data is flowing. If you have just installed GA4 or made changes to your site, open this report and click around your own site to verify everything is recording properly.

2. Traffic acquisition report

Found under Reports > Acquisition > Traffic acquisition, this is arguably the most important report for any small business. It answers the question: where are my visitors coming from?

You will see your traffic broken down by channel group:

• Organic Search: People who found you through Google, Bing, or other search engines
• Direct: People who typed your URL directly or used a bookmark
• Referral: People who clicked a link on another website
• Paid Search: Visitors from Google Ads or other paid search campaigns
• Social: Traffic from Facebook, Instagram, LinkedIn, etc.
• Email: Clicks from email campaigns (if you use UTM parameters)

What to look for: Are you investing in SEO? Organic Search should be growing month over month. Running Google Ads? Check that Paid Search traffic is proportional to your spend. Getting referral traffic from a directory listing? That tells you the listing is working.

This report is the foundation of any digital marketing strategy. If you only look at one report, make it this one.

3. Pages and screens report

Found under Reports > Engagement > Pages and screens, this shows which pages on your website get the most views and, critically, which ones keep people engaged.

Pay attention to these columns:

• Views: How many times the page was viewed
• Users: How many unique people viewed it
• Average engagement time: How long people actually spent reading or interacting with the page
• Key events: How many conversions happened on or after viewing that page

If your services page gets plenty of views but an average engagement time of 8 seconds, the content is not resonating. If a blog post has high engagement time but no key events, you might need a stronger call to action on that page. This is where conversion rate optimisation begins - understanding which pages are performing and which are leaking potential customers.

4. Landing page report

Found under Reports > Engagement > Landing page, this shows the first page people see when they arrive on your site. This is different from the Pages and Screens report, which counts all page views regardless of whether it was the entry point.

Why it matters: your landing pages are your first impressions. If your homepage has a 75% bounce rate, that is a signal to investigate. If a blog post is your top landing page but nobody clicks through to your services, you need better internal linking or a clearer call to action.

We use this report alongside website optimisation work to identify which entry points need attention. A landing page with high traffic but low engagement is a priority for improvement.

5. Key events report

Found under Reports > Engagement > Key events (previously called Conversions), this is where you see the actions that actually matter to your business. But here is the catch: you have to set these up yourself. GA4 does not know what a conversion means for your business until you tell it.

We will cover how to set up key events in the next section.

6. Tech details report

Found under Reports > Tech > Tech details, this tells you what devices, browsers, and screen sizes your visitors are using. It sounds mundane, but it is essential.

On most small business websites, phones now account for a large share of visits. If your website is not performing well on mobile - slow load times, awkward layouts, tiny buttons - you are losing a lot of potential customers. Page speed directly affects conversions, and this report tells you whether your mobile experience needs urgent attention.

GA4 setup for a small business: the key events to add first

Key events are the single most important thing you can configure in GA4. Without them, you are just counting visitors. With them, you are counting results.

Here is how to set them up:

Step 1: identify what matters

For most small businesses, the key events worth tracking fall into a few categories:

• Form submissions: Contact forms, quote request forms, booking forms
• Phone calls: Clicks on your phone number (tracked as tel: link clicks)
• Email clicks: Clicks on your email address
• Purchases: Completed e-commerce transactions
• Sign-ups: Newsletter subscriptions, account creation

Step 2: create or mark events

GA4 already tracks some events automatically. For form submissions, you often need to create a custom event. The simplest approach:

1. Go to Admin > Events
2. Click Create event
3. Name it something clear like form_submit_contact
4. Set conditions - for example, the event name equals page_view AND the page location contains /thank-you (if your form redirects to a thank-you page)

Step 3: mark as a key event

1. Go to Admin > Key events (previously Admin > Conversions)
2. Click New key event
3. Enter the event name you created
4. Toggle it on

Once this is set up, every report in GA4 can show you not just traffic, but which traffic channels, landing pages, and campaigns are actually generating leads or sales. This is the difference between vanity metrics and actionable data.

Understanding engagement rate vs bounce rate

If you remember Universal Analytics, you will remember bounce rate - the percentage of single-page sessions. A high bounce rate was generally considered bad, though it was often misleading (someone could read an entire blog post and leave satisfied, and it would still count as a bounce).

GA4 rethinks this entirely with engagement rate. A session is considered "engaged" if it meets any of these criteria:

• Lasted longer than 10 seconds
• Had 2 or more page views
• Had a key event

Engagement rate is the percentage of sessions that were engaged. Bounce rate in GA4 is simply the inverse - the percentage of sessions that were not engaged.

This is a much more useful metric. If someone lands on your contact page, reads your phone number, and calls you within 5 seconds, Universal Analytics would have counted that as a bounce. GA4 counts it more intelligently - if you have set up phone click tracking as a key event, that session is engaged.

For most small business websites, aim for an engagement rate above 50%. Service pages should be higher (60-70%+). Blog posts can be lower and that is fine - some people find their answer quickly and leave, and that is not a failure.

Making sense of your traffic sources

We touched on the Traffic Acquisition report above, but traffic sources deserve a deeper look because this is where most small businesses make their biggest strategic mistakes.

The "direct traffic" trap

If Direct traffic is your largest channel, something is probably wrong with your tracking, not your brand awareness. GA4 categorises traffic as Direct when it cannot determine the actual source. This often happens when:

• Links in emails do not use UTM parameters
• Your site switches between HTTP and HTTPS inconsistently
• People click links in mobile apps (which often strip referrer data)
• Someone saves your URL and visits later

If more than 30-40% of your traffic shows as Direct, it is worth investigating whether proper UTM tagging on your campaigns could recategorise some of that traffic into its actual source.

What UTM parameters are and why they matter

UTM parameters are tags you add to the end of URLs so GA4 can accurately attribute traffic. For example:

https://yoursite.ie/services?utm_source=newsletter&utm_medium=email&utm_campaign=march-promo

Use them on every link you control: email campaigns, social media posts, QR codes on printed materials, Google Business Profile links. Google offers a free Campaign URL Builder that makes this easy.

Setting up goals: what good looks like

Here is a practical framework we use with our clients to set up meaningful tracking:

For service businesses (trades, consultants, professional services)

• Primary key event: Contact form submission
• Secondary key events: Phone number click, email link click
• Engagement targets: 55%+ engagement rate on service pages, 40%+ on blog content
• Monthly check: Which traffic source generates the most key events per session?

For e-commerce (online shops)

• Primary key event: Purchase completed
• Secondary key events: Add to cart, begin checkout
• Engagement targets: 50%+ engagement rate on product pages
• Monthly check: What is the conversion rate by traffic source? Which products have the highest view-to-purchase ratio?

For local businesses (restaurants, salons, gyms)

• Primary key event: Booking/reservation form submission or phone click
• Secondary key events: Directions click, menu/pricing page view
• Engagement targets: 60%+ engagement rate (local visitors tend to be high-intent)
• Monthly check: Are Google Business Profile referrals increasing? Is mobile engagement rate holding?

Common GA4 mistakes we see in small business accounts

When we set up or audit GA4 on client websites, these are the mistakes we encounter most frequently:

1. No key events configured

This is the most common issue, full stop. GA4 is installed, data is collecting, but nobody has told it what a conversion looks like. The result is a dashboard full of traffic numbers with no way to know whether that traffic is generating business.

2. Tracking code installed twice

This happens more often than you would think, especially when a site uses a plugin like Google Site Kit alongside a manually inserted tracking code. The symptom is inflated page view counts and an artificially low bounce rate. Check Admin > Data streams to confirm you have only one active stream, and inspect your page source to make sure the GA4 tag appears only once.

3. Not filtering internal traffic

If you and your team visit your own website regularly (and you should), your visits are inflating your numbers. Set up an internal traffic filter:

1. Go to Admin > Data streams > Configure tag settings > Define internal traffic
2. Add your office IP address
3. Go to Admin > Data settings > Data filters and activate the internal traffic filter

4. Ignoring the data for months

GA4 data is most valuable when you review it regularly. We recommend a quick 10-minute check every Monday: glance at traffic acquisition, check key events, note anything unusual. A monthly deeper review - comparing month-over-month trends - takes 30 minutes and can reveal seasonal patterns, the impact of marketing campaigns, or pages that are quietly losing traffic.

5. Obsessing over vanity metrics

Total page views and user counts feel good but tell you very little on their own. A spike in traffic from social media looks impressive until you realise those visitors had a 90% bounce rate and generated zero enquiries. Always tie your metrics back to key events. The question is never "how much traffic did we get?" - it is "how much of that traffic did something valuable?"

6. Not connecting Google Search Console

GA4 tells you what people do on your site. Google Search Console tells you how they found you - which search queries triggered impressions, which ones generated clicks, and where you rank. Connecting the two gives you a complete picture. Link them under Admin > Product links > Search Console links.

A simple weekly GA4 routine

Here is the routine we recommend to every small business client. It takes 10 minutes:

1. Check key events for the past 7 days. Are enquiries, calls, or purchases on track compared to last week?
2. Glance at traffic acquisition. Any channel growing or dropping significantly?
3. Look at top landing pages. Anything surprising in the top 5? A blog post suddenly getting traffic could indicate a ranking improvement.
4. Check engagement rate on key pages. If a service page drops below 50%, investigate.
5. Note one action item. Maybe it is updating a low-engagement page, adding a CTA to a high-traffic blog post, or investigating a drop in organic traffic.

That is it. You do not need hours of analysis or complicated dashboards, just a focused check that keeps you connected to how your website is performing.

When to call in professional help

GA4 is powerful, but there are situations where working with an agency or analytics specialist makes sense:

• You need custom event tracking beyond basic form submissions (e.g., scroll depth triggers, video engagement, multi-step funnels)
• You want to connect GA4 to Google Ads for conversion-based bidding and remarketing audiences
• Your e-commerce tracking needs proper revenue and product-level data
• You suspect your data is unreliable and need a full tracking audit
• You want custom reports or dashboards using Looker Studio (formerly Google Data Studio)

If any of that sounds relevant, we are happy to help. We set up and manage GA4 for businesses in Ireland and the US as part of our website optimisation service. A good first step is a free website audit, which we go through with you on a free 20-minute call.