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Google Tag Manager logo
Tag ManagementMedium complexity

Google Tag Manager

by Google

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Sets cookies
No
Sends PII
No
Cross-site tracking
No
Consent required
Not required

Overview

Tag management system for deploying and managing tracking tags without code changes. Operates as a JavaScript container loading tags, triggers, and variables based on configurable rules. Does not collect personal data itself, but orchestrates tags that do - making container governance critical. Supports web and server-side (sGTM) containers.

Detection capabilities

Signature count
5
Detection methods
network
Property types
pathnamehostname

Consent Mode v2

Consent Mode v2

Google Consent Mode v2 signal requirements for this tag.

analytics_storagenot required
ad_storagenot required
ad_user_datanot required
ad_personalizationnot required

Performance impact

Performance Impact

Script size
85 KB
Requests per page
1

Common mistakes

  • 1Granting publish access to users who don't understand consent - one misconfigured tag creates regulatory risk
  • 2Deploying tags without consent settings, so they fire regardless of CMP status
  • 3Never auditing the live published container - may contain tags added by others
  • 4No version history or change notes, making audit trail impossible
  • 5Allowing custom HTML tags that inject arbitrary JavaScript, bypassing built-in consent checks

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