What Is Google Analytics 4 & How to Set It Up (Beginner's Guide)

Short answer

Google Analytics 4 (GA4) is a free tool from Google that shows you how many people visit your website, where they come from, what they do while they're there, and whether they take actions that matter (like calling you or buying). It's free and takes about 15 minutes to set up.

What GA4 replaced

Google Universal Analytics (UA) was shut down in 2023. GA4 is its replacement. If you set up Google Analytics before 2023, you're likely using the old version — you'll need to set up GA4 separately.

What GA4 tracks

Users and sessions — how many people visited your site and how many times.

Traffic sources — where visitors came from: Google search, social media, direct (typed your URL), referral (another website linked to you).

Pages — which pages get the most views, how long people stay, and how quickly they leave.

Events — GA4 is event-based, meaning it tracks actions like clicks, form submissions, video plays, file downloads, and scroll depth automatically.

Conversions — you tell GA4 which events matter most (a phone number click, a form submission, a purchase) and it tracks how often those happen.

Why it matters for small businesses

Without analytics, you're guessing what's working. With GA4 you know:

Which marketing channel sends the most visitors (so you can invest there)
Which pages lose visitors fast (so you can improve them)
Whether people who come from Instagram ever buy anything (so you know if Instagram is worth the time)

This data pays for itself many times over by helping you stop wasting money on things that don't work.

GA4 vs Google Search Console

They answer different questions. GA4 covers what happens after someone arrives on your site. Google Search Console covers how your site appears in Google search results before the click.

How to set up GA4 (quick version)

Go to analytics.google.com and sign in with your Google account
Click Start measuring and create a new account and property
Choose Web as your platform, enter your website URL
Copy your Measurement ID (starts with G-)
Add it to your website — via a plugin if you use WordPress, or directly in your site's <head> tag

The full process takes about 15 minutes. For platform-specific instructions, see the complete GA4 setup guide.