A plain-language explanation
Google Tag Manager is a tag management system that allows you to implement and update measurement codes without having to edit the website files every time.
Where it helps in practice
GTM manages tags without a code release for every change, increasing speed and the risk of uncontrolled publishing.
The decision before implementation
Define roles, naming, environments, approval and the boundary between tag logic and application code.
How to verify the result
Audit container versions, unused tags, firing order, consent, performance and rollback readiness.
