The Gtm Tools by Simo Ahava is a Google Sheets add-on. It lets you manage and update your Google Tag Manager containers, tags, triggers, and variables. In this first iteration, the tools feature a Documentation builder, which lets you automatically generate documentation for the latest version of your Google Tag Manager container, tags, triggers, and variables. In addition to this, the toolset features a Push changes to Notes functionality, which lets you automatically mass update the Notes field across your tags, triggers, and variables.