Google Analytics 4 (GA4) is the most widely used audience measurement tool in the world. Free, powerful and plugged into the whole Google ecosystem, it tells you precisely who visits your site, where they come from, what they do and whether you are hitting your commercial goals. At ConvertiLab we install and configure GA4 for all 150+ of our clients: it is the first thing we do once a site goes live.
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How do you install Google Analytics 4 on your website in 2026?
To install Google Analytics 4, go to analytics.google.com, create an account in your company's name, set up a property with your URL, time zone and currency, then install the GA4 tag. The recommended route is Google Tag Manager (GTM): install GTM first, either through a plugin (on WordPress: Site Kit by Google or MonsterInsights) or by adding the code inside the head tag, then add your GA4 tag from the GTM interface without touching any code. Check the installation with the "Google Analytics Debugger" Chrome extension and the GA4 Realtime report.
The three ways to install GA4, depending on your situation:
Which Google Analytics 4 reports should you check every week to steer your business?
There are five GA4 reports worth mastering. 1) The acquisition report (Reports > Life cycle > Acquisition), which shows where your visitors come from: Organic Search (SEO), Social, Email, Paid Search. 2) The engagement report (Pages and screens), which shows what visitors do on each page. 3) The Realtime report, useful for testing an installation or watching behaviour as it happens. 4) Explore > Funnel, to see where you lose prospects in your funnel. 5) The conversions report, to follow form submissions, purchases and phone clicks. If you are just starting out with GA4, begin with reports 1 and 5 alone, acquisition and conversions. Get comfortable with those two before venturing into the advanced explorations.
Acquisition channels worth watching in GA4:
How do you set up conversion tracking in Google Analytics 4?
To set up conversions in GA4, go to Admin > Events, find the event you want to follow (form_submit for a contact form, purchase for a sale, phone_call for a click on a phone number), and click "Mark as conversion". GA4 collects some standard events automatically (scroll, click, video). For custom conversions, such as a specific form or a CTA button, create a custom event through Google Tag Manager. Without conversions in place, GA4 cannot tell you whether your site is meeting its business goals. One practical tip: always set up a thank-you page after a form submission (for example /thank-you-contact) and create a GA4 event triggered by a visit to that page. It is the most reliable tracking method and the least prone to false positives.
Four GA4 configuration mistakes that distort your data:
How do you read your GA4 data and make marketing decisions based on the numbers?
Three GA4 metrics are worth a weekly look: active users over two weeks (how your audience is growing), engagement rate above 60% (traffic quality, and below 40% your content or user experience has a problem), and conversions by source (which channels bring in the most leads). In practice: if 80% of your traffic comes from "Direct" and almost none from "Organic Search", your SEO needs attention. If your Services page gets 1,000 views but only 5 clicks through to Contact, the page is not convincing. Book a 15 minute weekly review of those three metrics.
The ideal GA4 dashboard for a small business, six cards to display:
This dashboard takes under 10 minutes to build in GA4 through "Reports > Library > Create a report" and gives you a full picture in 15 minutes a week without drowning you in data.
Using GA4 Explorations for deeper analysis:
Explorations are the most powerful part of GA4 for an ambitious small business. The "Path exploration" report shows you exactly which pages visitors look at before they convert, which is invaluable for spotting the pages that act as stepping stones towards your contact form. The "Funnel exploration" report reveals the precise step at which you lose prospects in your ordering or enquiry process.
Frequently asked questions about Google Analytics 4
Is GA4 free?
Yes, Google Analytics 4 is completely free for standard websites. There is a paid version (GA4 360) aimed at very large companies, but for a small business or a sole trader the free version is more than enough. Google Tag Manager, which we recommend for the installation, is also completely free.
What is the difference between GA4 and Universal Analytics?
Universal Analytics, the older version, was switched off for good in July 2023. GA4 is built on an event model rather than sessions, it tracks visitors across devices (mobile, tablet and desktop), it uses AI for predictive insights, and it was designed for a world without third-party cookies. If you think you still have a live Universal Analytics property, you do not: it no longer exists. The main practical difference is that GA4 measures "engagement" (active sessions over 10s, or sessions with a conversion) rather than raw "sessions", which gives you a truer picture of how good your traffic really is. A GA4 engagement rate above 60% is usually a sign of a well qualified audience.
How do I measure whether my site generates leads with GA4?
Set up a conversion event for every contact form on your site (a form_submit event, or a thank-you page). In GA4, go to Reports > Life cycle > Conversions and filter by "form_submit". You will see how many leads come from SEO, from social media and from your emails. It is the only way to know your real conversion rate for each channel.
How can GA4 data help improve your SEO?
Link GA4 to Google Search Console (Admin > Links > Search Console property), then open the "Google Organic Search" report in GA4. This combined report shows which keywords bring in qualified traffic (clicks through to your service pages), which pages have a weak click-through rate despite ranking well (a chance to improve the meta title and description), and which queries earn impressions but no clicks (untapped potential you can address with targeted content). A real ConvertiLab example: a locksmith in Lyon was spending 600€ a month on Google Ads without knowing whether his leads came from the ads or from SEO. Once GA4 was installed with conversion tracking, he found that 74% of his leads came from SEO (at no cost) and only 26% from the ads (600€ a month). He moved 400€ of his ads budget into extra SEO content, and his quarterly revenue rose by 23%. !Google Analytics 4 Search Console, keywords CTR impressions SEO opportunities
