I'm trying to understand the section on Mobile Apps on https://developers.google.com/tag-platform/tag-manager/server-side/send-data . I'm at a loss when it comes to following these instructions for mobile. I'm trying to capture data that I can send to my own server (potentially as well as to GA4) so in the server side container I have a client which sends to my API.
The main sentence I need help with is "Set the value of Image URL to a pixel image on the server container at the path in the Measurement Protocol client that you specified earlier".
Can anyone point me to a dummy's type guide about how to create that pixel image on the server container?
Also, "Measurement Protocol client that you specified earlier" doesn't seem to correspond to anything in the previous instructions, and the link to Measurement Protocol implies that GA4 should be used instead. How would this work with the scenario I'm setting up?
Has anyone actually got sGTM working with mobile apps?