Most teams that set up GTM server-side tracking hit the same wall: the web container and server container aren't talking to each other correctly. Data gets lost, events don't fire, and you're left guessing whether your server-side setup is actually working.There are two ways to send data from your GTM web container to the server containerthe native GA4 transport method and Stape.io's Data Tag. The native method works for basic GA4 setups, but it has limitations: it can't send data arrays, it requires manually mapping every variable, and it gives you no way to transform or store data between pages.This guide shows you how to use the Data Tag + Data Client method to transfer data from your web container to your server container with the exact configuration we use for client setups.
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