Google Tag Manager Tutorial for Beginners
Updated: October 15th, 2025.

Google Tag Manager is an amazing tool. Need to add a particular tracking pixel to a website? Not a problem! Want to track submissions of a newly created form? Consider it done—all thanks to GTM.

Google Tag Manager is a free tool that allows you to manage and deploy marketing and analytics tags (snippets of code) on your website without having to modify the site’s code directly. Its primary benefit is giving marketers and analysts the power to add tracking scripts for tools like Google Analytics, Google Ads, and Meta Pixel quickly and easily from a central web interface.

Instead of waiting (for days) for a busy developer to add those tracking codes, you could do this yourself (in many cases). Even though you will not replace developers 100% (and, in fact, you never should), with Google Tag Manager, you (and your team) will become more agile in implementing new marketing campaigns and/or web analytics tracking.

But where should you start? Tag Manager looks like a tank that requires specific knowledge, and your regular driver’s license won’t help much here. Just like any other tool, GTM has its learning curve. That’s why I decided to create this Google Tag Manager tutorial. It’s the first step towards becoming more independent + having more control over your analytics/marketing tracking codes.

Ready? Let’s start. If you have questions about GTM, feel free to comment.

By the way, I’ve prepared a free Google Tag Manager ebook containing even more useful information, so if you’re serious about learning GTM, download it.

Subscribe and Get the Ebook – Real Book Img – GTM for Beginners
Table of Contents
Here’s what you will learn in this blog post

Before we continue: The Pre-Tag-Management World
What is Google Tag Manager?
Google Tag Manager vs Google Analytics
Top benefits of Google Tag Manager
Fast Deployment of Tracking Codes
All Tags Are Controlled in a Single Place, your GTM account
Built-in and 3rd-Party Testing Tools
Fairly simple event tracking
Ready-made Tag templates
How Does Google Tag Manager Work?
Create a Google Tag Manager Account
How to Install Google Tag Manager?
How to check if Google Tag Manager is working?
Creating Your First Tag in Google Tag Manager
Save the tag
Testing with GTM Preview Mode and GA4 DebugView
Publishing the Google Tag Manager Container
What’s next?
If you need to become a GTM professional
What should you learn next after you read this Google Tag Manager tutorial?
Frequently Asked Questions
Final words

Video tutorial
If you prefer to learn from the video content, I have recorded a Google Tag Manager tutorial and published it on YouTube. To get started, click on the video player below or click this link.

Before we continue: The Pre-Tag-Management World
Before we dive deeper into what Google Tag Manager is, let’s take a quick look at the world we used to live in (a.k.a. “without tag management”). Whenever you want to install Google Analytics or some other web tracking tool, it prompts you to add a piece of their JavaScript code (a.k.a. tag) on your website. Pretty standard, right?

It can be Hotjar, Google Analytics, or some other tool, but they all ask you to add their code (tag) to your site. When a visitor lands on your website, that tracking code is also loaded. Therefore, a visitor is tracked.

Adding that one tag to a site isn’t a big deal. You ask a developer, and he/she will do that (sometimes on the same day, sometimes over several days, but still reasonable because this has to be done only once).

But here’s the catch. Out of the box, GA4 offers plenty of metrics and some automatic event-tracking capabilities. But to make really good and thoughtful decisions, you need to track much more: interactions (e.g., form submissions), sales, etc.

This means that more tracking codes must be added to a website. And usually, this is not just a “one-time project”. You must constantly add new tracking codes and modify/remove the current ones.

That’s where the developer (and the IT department) becomes a bottleneck. Since he/she is working on his/her own tasks/projects, marketing/analytics tasks are often a B priority. Therefore, you and your team have to wait. And wait a bit more. And more.