server-side
Mapping a custom subdomain to your tagging server in Google Cloud Platform (Cloud Run)
Mapping a subdomain to your tagging server takes server-side tagging a step further. You get a first-party context, which means more secure and, above all, longer-lasting cookies. As a result, your data is more accurate and your ads target users more precisely, which should translate into lower ad spend. This article walks you through the setup step by step.