Programming Tutorials

  In-app header bidding is notoriously fragile. You spend weeks configuring Prebid Server, integrating the SDKs into Android and iOS, and setting up Line Items in Google Ad Manager (GAM), only to face the most frustrating metric in Ad Tech:   High Bid Rate, Low Render Rate. If you are integrating Smaato via Prebid (Unified Bidding), you have likely encountered a specific, silent failure mode. You see the bid win in the console logs, the GAM Line Item matches, but the ad slot remains blank or defaults to a fallback. Often, this is due to an  Adspace ID Collision . This occurs when the creative cached in Prebid Server is retrieved by a GAM creative wrapper that lacks the specific Smaato Adspace context required to render it, or when static Line Item configurations conflict with dynamic bid parameters. This guide details the root cause of this collision and provides a production-grade implementation to resolve it using dynamic macro injection and Universal Creatives. The Roo...