SeersAi

  If you run Amazon Ads for your ecommerce store, your campaign data already has gaps in it. Every time a shopper clicks "reject all" on your cookie consent banner, Amazon stops receiving tracking data for that session. Amazon Consent Signal (ACS) is the mechanism that tells Amazon what a visitor chose and keeps your ad performance measurable. This is not a minor technical detail. According to the Seers AI ecommerce blog , ecommerce brands lose nearly half their visitor-level data without consent signals in place. For a store spending thousands on Sponsored Products or DSP campaigns, that gap translates directly into wasted budget and inaccurate reporting. What Amazon Consent Signal Actually Does ACS sends three pieces of information to Amazon's advertising systems. The first is whether the shopper approved processing of their personal data. The second is whether they approved ad-related data storage. The third is their country code, which helps Amazon apply the corre...

  There's a quiet rule change inside Amazon Ads that's been hurting attribution for sellers since the start of 2026, and most teams haven't noticed yet. The change isn't legal. It's mechanical. And it's costing real money in DSP campaigns every week. Here's what's actually happening, and what to do about it. What 'Amazon-certified' really means Amazon now reviews each Consent Management Platform against a strict technical checklist. The most important box: full support for the Amazon Consent Signal, also called ACS. ACS is the framework Amazon uses to confirm a shopper's exact choice on cookies, marketing, and ads measurement. If a CMP ships ACS correctly, Amazon certifies it. If it doesn't, Amazon treats it as a generic banner regardless of how popular the brand name is. Why this changes the numbers on your dashboard When ACS is missing or malformed, Amazon Ads quietly defaults to restricted tracking. DSP audiences shrink. Sponsored...