This variable template lets you store different Google Tag Manager server-side endpoint URLs at the same time, and dynamically assign them to the Google Analytics events, based on certain conditions.
The available conditions are "contains", "match regex" and "equals". You can use a string-formatted value or variable to be checked against them.
For example, you may want to send data to different active server containers based on the event name, hostname, page, country, language or other website and tracking information.
It's also valuable if you're using the same client GTM for multiple environments (like development, staging and production), each of them associated with a different server-container.
An additional plus is the possibility to quickly enable or disable a single server-side endpoint of the list, without having to touch other settings in your GTM, Google Cloud or third-party vendor of the server container deployment. In this way, the disabled server endpoint won't receive any data, leaving you with just the little potential costs of service maintenance.
Here the template is used for deploying three different server-side endpoints at the same time, based on the pushed event (the {{Event}} variable is the Condition Value).
The variable looks for "value1", "value2" or "value3" in the event name, and routes the data to the associated server container.
The last endpoint is currently disabled (Enabled = false), meaning the data from "something_value3" event is currently sent client-side.
The Multi server-side variable is then used in the general Events Settings variable of GA4, as the "server_container_url" parameter.
