Map array in server side Google tag manager
Sometimes you need to send to a third party service a different array structure than the one specified on Google Analytics 4 (GA4). So, in case you don’t want to create a new event only for this service and you want to reuse as much as posible a GA4 event like add_to_cart, then you need to map the GA4 built in array on GTM. This sounds pretty easy if you have used GTM (no server side) before, basically you create a new custom javascript variable and return the mapped array....