Google Tag Manager and Google Analytics on Simo Ahava's blog

Server-side Google Tag Manager is essentially a server application (running on Node.js), which Google has helpfully composed into a Docker image. Docker, on the other hand, is an environment for creating, sharing, and running applications, right from the Docker platform itself. In short, it’s a way to package an entire application and its execution environment, so that any...

On June 30, 2025, Google announced that they are consolidating how Google’s script libraries for the web (e.g. gtm.js and gtag.js) are loaded when using a server-side Google Tag Manager container. Before, you had the Web Container Client for loading the gtm.js file, and you had the Google Analytics 4 Client for loading the gtag.js file. Now, you only use the former. There...