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Custom HTML tags

Custom HTML Tags in Google Tag Manager (2025 Guide)

Ever wondered how Custom HTML Tags help you control website tracking, without touching the code?

Custom HTML Tags in Google Tag Manager (GTM) enable you to add your own code, such as JavaScript, tracking pixels, or third-party widgets, directly to your site; you do not need to edit the site’s core files.

They’re incredibly useful when custom scripts aren’t available through built-in templates, offering a flexible way to implement advanced tracking, marketing scripts, and interactive features.

In this guide, you’ll learn what Custom HTML Tags are, how they work, and when to use them. You’ll learn how to set them up and simplify reporting with Analytify in WordPress. We’ll also go over best practices, troubleshooting tips, and alternative tagging methods.

Let’s get started!

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