If you’re not that familiar with Google Tag Manager, you are probably wondering what it is and why you should use it. Let’s answer the most common questions around Google Tag Manager.
Google Tag Manager is a free tool that allows you manage and deploy marketing tags (snippets of code or tracking pixels) on your website (or mobile app) without having to modify the code.
Here’s a very simple example of how GTM works. Information from one data source (your website) is shared with another data source (Analytics) through Google Tag Manager. GTM becomes very handy when you have lots of tags to manage because all of the code is stored in one place.
A huge benefit of Tag Manager is that you, the marketer, can manage the code on your own. “No more developers needed. Whoo hoo!”
Sounds easy right? Unfortunately, it’s not that simple.
“GTM is unfortunately misunderstood, overused, and abused. Although the idea of empowering marketers to easily do technical stuff on websites was/is very appealing, the fallout of not fully understanding the technical implications of code insertion and tagging can be detrimental to page structure and load time performance.” – Angie Schottmuller, Conversion Optimizer
According to Google,
“Google Tag Manager helps make tag management simple, easy and reliable by allowing marketers and webmasters to deploy website tags all in one place.”
They say it’s a “simple” tool that any marketer can use without needing a web developer.
I may get run over in the comments section for saying this, but I’m standing my ground. Google Tag Manager is not “easy” to use without some technical knowledge or training (courses or self-taught).
You have to have some technical knowledge to understand how to set up tags, triggers and variables. If you’re dropping in Facebook pixels, you’ll need some understanding of how Facebook tracking pixels work.
If you want to set up event tracking in Google Tag Manager, you’ll need some knowledge about what “events” are, how Google Analytics works, what data you can track with events, what the reports look like in Google Analytics and how to name your categories, actions and labels.
Although it is “easy” to manage multiple tags in GTM, there is a learning curve. Once you’re over the hump, GTM is pretty slick about what you can track.
“Google Tag Manager has made the process of managing analytics and marketing tags easier than ever before. With this, most marketers do not realize what Google Tag Manager is actually doing and what happens when mistakes are made.
At Analytics Pros, we never recommend anyone use Google Tag Manager on their live site without a few months of training and experience. GTM is injecting code directly on the site, which means while unlikely, there is a possibility could break your website.
We have seen issues where users have injected plaintext on their pages, broken URLs and broken marketing tags and Analytics. The most successful GTM accounts have both marketing and technical resources involved with configuration, maintenance and updates.” – Charles Farina, Analytics Pros, @CharlesFarina
There are three main parts to Google Tag Manager:
Tags are snippets of code or tracking pixels from third-party tools. These tags tell Google Tag Manager what to do.
Examples of common tags within Google Tag Manager are:
Triggers are a way to fire the tag that you set up. They tell Tag Manager when to do what you want it to do. Want to fire tags on a page view, link click or is it custom?
Variables are additional information that GTM may need for your tag and trigger to work. Here are some examples of different variables.
The most basic type of constant variable that you can create in GTM is the Google Analytics UA number (the tracking ID number).
Those are the very basic elements of GTM that you will need to know to start managing tags on your own.
If you’re bored reading this right now, you won’t have any issues managing your tags. If you are completely lost, you are going to need help from someone more technical.
Google Tag Manager is a completely different tool used only for storing and managing third-party code. There are no reports or any way to do analysis in GTM.
Google Analytics is used for actual reporting and analysis. All conversion tracking goals or filters are managed through Analytics.
All reporting (conversion reports, custom segments, ecommerce sales, time on page, bounce rate, engagement reports, etc…) are done in Google Analytics.
Once you get over the learning curve, what you can do in Google Tag Manager is pretty amazing. You can customize the data that is sent to Analytics.
You can set up and track basic events like PDF downloads, outbound link clicks or button clicks. Or, complex enhanced ecommerce product and promotion tracking.
Let’s say we want to track all outbound links on the website. In GTM, choose the category name, action and label. We chose offsite link, click and click URL.
In Google Analytics go to Behavior > Events > Top Events > Offsite link.
Now select either event action or label to get the full reports. The data that we set up in Google Tag Manager is now appearing in the Analytics reports. Nifty!
Want to try out a tool on a free trial basis? You can add the code to Tag Manager and test it out without needing to get your developers involved.
1. You must have some technical knowledge, even for the basic setup.
Check out the documentation from Google on how to setup Google Tag Manager. Once you get past the “Quick Start Guide,” it takes you to a developer guide. Not a marketer’s guide. If you are a first time user, this will read like gibberish.
2. It’s a time investment.
Unless you’re a seasoned developer, you will need to carve out a chunk of research and testing time. Even if it’s reading a few blog posts or taking an online class.
3. Make time for troubleshooting issues.
There is a lot of troubleshooting that takes place when setting up tags, triggers and variables. Especially if you are not in Tag Manager regularly, it’s very easy to forget what you just learned. For more complex tags, you will likely need a developer with knowledge of how the website was built.
“One of my favorites is content grouping in Google Analytics combined with Google Tag Manager. It allows you to define content groups by Rules/Macros. You can then see which elements of your blog posts (e.g. images, videos, length, title length) lead to the most conversions, longest time on page, etc.
We are just scratching the surface of what you can do in Google Tag Manager. The possibilities seem almost endless. But, as Himanshu Sharma points out, the more tags and data sources you have the harder they are to manage.
“The happiness that you get by managing all the tags from one central location is short lived and the trouble is around the corner. As your need for integrating website data with various data sources increases and become more complex, you quickly realize, how hard it can be to create and maintain each integration.” – Himanshu Sharma, Optimize Smart, @optimizesmart
I took a live course through Conversion XL with Chris Mercer. It was one of the best online classes I’ve taken. You can purchase the recordings if you are interested.
Other go-to resources are:
Google Tag Manager can definitely make your life easier if you are willing to learn how it works. Make sure that you are actually using the data that you are setting up in GTM. Otherwise, what’s the point?
I’m curious to hear your experience with Google Tag Manager. Has it been easy or hard? How are you using it in your marketing?