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Vendor reference · Tag management

Google Tag Manager

Google's tag management system. It loads a container script that fires the analytics, advertising and other tags configured for the site.

Google Tag Manager at a glance

Company
Google
Category
Tag management
Tag script
https://www.googletagmanager.com/gtm.js?id=GTM-XXXXXX
Sends data to
www.googletagmanager.com
JavaScript object
dataLayer
Network requests
GTM gtm.js

What Google Tag Manager is

Google Tag Manager (GTM) loads a container script on the page and fires the tags configured in the GTM web interface. It lets teams add and change tags from Google and other vendors without editing the site's code for each change.

A container is identified by an ID that starts with GTM-. The container itself sends no analytics data; the tags inside it do.

What marketers use it for

Marketers use it to deploy and manage analytics, conversion and remarketing tags from one place. Triggers and variables, often fed by the dataLayer, decide when each tag fires.

How to recognize Google Tag Manager on a site

  1. Open the site in Chrome, open DevTools (F12, or Cmd+Option+I on a Mac) and go to the Network tab.
  2. Reload the page and type gtm.js into the filter box. The container loads from googletagmanager.com/gtm.js with its ID (GTM-...) in the id parameter. A site can load more than one container.
  3. In the Console tab, type dataLayer and press Enter. Lists the events pushed to the data layer so far. Other tags use a dataLayer too, so confirm with the gtm.js request.

Network requests

What TagPipes observed

30%

of sites scanned had Google Tag Manager detected

TagPipes scanned 41,162 public websites between August 11, 2026 and September 13, 2026, loading up to three pages per site in a real browser as a first-time visitor, and matched what loaded against the TagPipes Vendor Registry. That is how TagPipes recognizes Google Tag Manager: by the hosts its tag loads from and the cookies attributed to it.

Observed TagPipes scan data, not a figure published by Google. Websites of TagPipes customers are excluded and no individual site is named. Snapshot dated September 13, 2026.

Sources

What it is, what it is used for, and its scripts, hosts and JavaScript objects were checked against the vendor documentation above on . The detection rate is TagPipes scan data from September 13, 2026, not a value published by the vendor. Browse all vendors.

Know when a tag stops firing

TagPipes Auditor checks with real browsers that your marketing pixels fire with the right parameters, and alerts you when tracking breaks. Pulse checks how marketing tags behave against your consent banner.

See Auditor See Pulse

TagPipes monitors, configures and reports. It does not determine legal compliance and does not provide legal advice. Output is informational and reflects observed state at the time of observation. Rawsoft's expertise is technology, not law; please confirm any regulatory interpretation with your own counsel.