Google Tag Manager

Created: 2020-05-05 10:51:10 -0700 Modified: 2020-05-05 12:07:43 -0700

Basics

Google Analytics is actually a subset of GTM.
You can use this to manage any other embeds, not just Google products. E.g. you can incorporate a Facebook pixel (reference), your own custom scripts for event trackers, etc.
All changes that you make on the GTM site are staged, so you have to publish them before they’ll take effect.
Liquidor: Tip: Setup a filter for your own IP so you don’t spam your Analytics with your own visits. You can setup a filter in GA and Exclude with IP. Just make sure to hide this while creating the filter (the IP is hidden unless you edit the filter in the future)
- Alternatively, just don’t opt in to your own marketing cookies.
You can apparently debug/check your setup using this Chrome extension

I had to make an account. This is separate from a Google Analytics account.
I think it’s typical for the container name to be the same as your domain, e.g. adamlearns.com
It gave me code that I added to my site.
- At that point, you don’t need Google Analytics’ scripts specifically since GTM loads GA.

When I got to the step about creating a pixel on Facebook, I couldn’t actually use business.facebook.com; there was no “Create account” button anywhere despite their instructions saying that it would be there. Codephobia found this link for me, which linked to a working Events-Manager link.
When setting up the pixel, it was suggested to me not to let Facebook easily set it up for me. Instead, I chose “manually add code to website”.
At first, I didn’t set up any custom events, e.g. for purchasing or for specific actions that a user may take.
Publish the changes.

I made a new tag
For the tag type, I chose Google Analytics: Universal Analytics
In Google Analytics Settings → Select Settings Variable…, chose “New Variable” and type in your tracking ID
Set the “Tag firing options” to “Once per page”.
Add a trigger for “All Pages”
Publish the changes.