How to set up Google Analytics 4 (GA4) for your business
You cannot improve what you cannot measure, and GA4 is how you measure. Here is how to set it up properly and, more importantly, track the actions that actually matter to your business.
By the Media On Tap editorial team · Published 9 September 2026
Google Analytics 4 (GA4) is the free tool that tells you how people find and use your website — and, set up properly, which marketing actually produces enquiries. Many Singapore businesses install it, then never configure the one thing that makes it useful: conversion tracking. This guide covers the setup and the part most people skip.
Create the GA4 property
Sign in to Google Analytics with your business Google account (own it under your own email — never the agency's), create an account and a GA4 property for your website, set the reporting time zone to Singapore and the currency to SGD, and create a "web" data stream for your domain. GA4 will generate a Measurement ID (starting with G-).
Install the tag
You have two common options. The simplest is to paste GA4's Google tag directly into your site's <head> on every page. The more flexible is to install Google Tag Manager and deploy GA4 through it — worth it if you will track several things or run ads, because you manage all tags in one place without editing code each time. Either way, verify it is firing before you trust the data.
Installing GA4 is step one, not the finish line. Out of the box GA4 tells you how many people visited. That is interesting, not useful. The useful part is telling you how many enquired, and from which channel — which means setting up conversion events, below.
Track the conversions that matter
Decide what a real conversion is for your business — a contact-form submission, a phone-number click, a WhatsApp click, a booking. In GA4 these are "events" you mark as "key events" (conversions). Set up an event for each meaningful action so that, over time, you can see not just traffic but outcomes: which pages and which channels actually produce enquiries. This single step is what turns analytics from a vanity dashboard into a decision tool. See what a good conversion rate looks like once you're measuring.
Connect the other tools
- Google Search Console. Link it to GA4 to see the organic search queries bringing people in — essential for SEO.
- Google Ads. Link it so you can see which campaigns produce conversions, not just clicks. This is the difference between profitable and blind ad spend (see Google Ads costs).
Respect privacy
Configure data retention sensibly, be mindful of what you collect, and make sure your privacy policy reflects your analytics use. Good measurement and respecting your visitors are not in conflict.
If setting this up correctly — especially the conversion tracking and ad linking — is not how you want to spend an afternoon, it is part of the groundwork we lay for every SEO and Google Ads engagement, so the numbers we report are real.
Frequently asked questions
Yes. GA4 is free for the vast majority of businesses; there is a paid enterprise tier (GA4 360) that most SMEs never need. The cost is not money but setup — installing it correctly and, crucially, configuring conversion tracking so the data is actually useful.
GA4 is the analytics tool that collects and reports the data. Google Tag Manager (GTM) is a separate, optional tool for deploying and managing tags — including GA4 — without editing your site's code each time. You can install GA4 directly; GTM is worth it once you're managing several tags or running ads.
Almost always because conversion events (key events) were never configured. GA4 tracks page views out of the box but does not know what a 'conversion' means for your business until you define an event for it — a form submission, a call click, a booking — and mark it as a key event. Set those up and conversions will appear.
You should own it. Create the GA4 property under your own business Google account and add your agency as a user you can remove. If your analytics lives on the agency's account, you lose all your historical data the day you part ways.