GA4

Also called Google Analytics 4

Reviewed 31 Oct 2026 By Madiha Fatima 4 min read Check it yourself: yes, free

4 min

Definition

GA4 is Google Analytics 4, the free tool from Google that records what people do on your website: where they came from, which pages they viewed, how long they stayed and whether they called, booked or bought. It replaced the older Universal Analytics in 2023 and counts everything as an event rather than a page view.

Out of the box it counts visits and page views and little else. The useful part, knowing which visits turned into enquiries, only works once someone marks your calls, forms and purchases as key events. Most small business sites have GA4 installed and that step never done, so the tool is running but not answering the question that matters.

GA4 is loaded through a gtag.js snippet or a Google Tag Manager container carrying a G- measurement ID. Everything is an event with parameters: page_view, scroll, outbound click and file_download are collected automatically under enhanced measurement, and custom events (a form submit with its form id, a tel: link click, purchase from Shopify's native integration) are sent with gtag('event', ...) or a Tag Manager trigger, then promoted to key events in Admin.

Check that the tag fires once per page, not twice from a plugin and a theme, that your own domain and any external checkout host are listed as unwanted referrals so a payment round trip does not start a new session, and that internal traffic is filtered. Consent mode is required wherever cookie consent is.

<script async src="https://www.googletagmanager.com/gtag/js?id=G-XXXXXXXXXX"></script>

Short version: google's free visitor counter, useful once someone tells it what counts.

Why it matters for your business

GA4 is installed on most sites
and set up on very few.

Nearly every quote for a website says analytics included. What that usually means is the GA4 snippet has been pasted in. It will count visitors from day one and look busy. It will not tell you how many of them called, because telling it that is a separate job that needs someone to decide what a conversion is on your site and wire each one up. Ask for that in writing when the site is being built, and ask to see it working before you sign off.

Set up properly, GA4 answers the questions that decide spend. Which source brings the enquiries: search, maps, referrals or the paid campaign. Which pages people see before they call. Where on the path to checkout a Shopify store loses them. Without it, every marketing decision is taken on feel and every agency report is unverifiable.

It is also the second half of Search Console. Search Console shows what happened on Google before the click. GA4 shows what happened on your site after it. You need both to connect a search to a sale.

Example

A towing company that could not say
where its calls came from.

Before

A roadside recovery firm had GA4 on its site for two years. It showed a few hundred visitors a month and the pages they viewed. Asked which marketing brought the calls, the owner guessed: probably the Google listing, maybe the leaflets.

Visitors: counted
Calls: not counted
Forms: not counted
Source of each job: a guess

After an afternoon's setup

Tapping the phone number became an event. Submitting the callout form became an event. Both were marked as key events. Within a month GA4 could show that most calls came from organic search on a phone, late at night, from the emergency page, and that the leaflet campaign's web address had produced almost nothing. The leaflets stopped. The emergency page got the attention. Nothing was bought except an afternoon.

How to check it on your site

Four checks, all inside the free account.

Tick each one as you go. 0 of 4 checked on your site.

Confirm it is actually collecting
Sign in at analytics.google.com. In Reports, Realtime, open your own site in another tab and watch for yourself to appear. If nothing shows, the tag is missing or broken, and everything you have been told about your traffic since is wrong.
Look for key events
Go to Admin, then Events. Anything your business cares about, a phone tap, a form, a booking or a purchase, should be listed and switched on as a key event. If only page_view, session_start and scroll are there, the tool is counting visitors and nothing else.
Read the traffic acquisition report
Reports, Acquisition, Traffic acquisition. This splits visitors and key events by channel: organic search, direct, referral, paid, organic social. The channel with the most key events, not the most visitors, is the one earning its keep.
Check for double counting
If sessions look suspiciously high or engagement rate is oddly perfect, the tag may be firing twice, often once from a plugin and once from the theme. Realtime showing two page views for one load of yours is the giveaway. A developer can fix that in minutes.

Where this shows up in practice.

Analytics Traffic but no leads

The gap GA4 is meant to explain, and how to read it when it does not.

Pricing & transparency How to evaluate a website quote

Analytics included is a line on most quotes. Here is what to ask it to mean.

Service SEO & AI search

GA4 key events and the Search Console link are set up in month one, before any ranking work.

Related service

Setting up GA4 properly, key events, the Search Console link and a report you can read, is month one of the SEO service and is built into every site we deliver. Prices are on the price list, not on a call.

See the SEO service

Reviewed by Madiha Fatima, founder of 99creatix

Every entry in this glossary is written and checked by the person who runs the agency, reviewed at least once a quarter and dated. Last reviewed 31 October 2026.

Spotted an error or a term we are missing? Tell us and it is fixed within the week.

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Next step

Want to know what your GA4
is and is not counting?

Fifteen minutes and a login. We will tell you whether your enquiries are being measured, what is missing and what the fix costs, before you decide anything.

Book a 15-minute fit call Back to the glossary

GA4 is installed on most sitesand set up on very few.

A towing company that could not saywhere its calls came from.

Four checks, all inside the free account.

Usually in the same sentence.

Where this shows up in practice.

Want to know what your GA4is and is not counting?

GA4 is installed on most sites
and set up on very few.

A towing company that could not say
where its calls came from.

Want to know what your GA4
is and is not counting?