This document provides a step-by-step guide on how to control the firing of Google Tag Manager (GTM) tags based on the visibility of the Concrete CMS edit toolbar. It explains how to create a custom JavaScript variable in GTM to detect whether the edit toolbar is present on a page and how to set up a trigger that ensures GTM tags only fire when the toolbar is not visible. This setup is particularly useful for developers and marketers who want to ensure that tracking and analytics tags are not activated during content editing sessions, thereby preserving the accuracy of data collected.