DSA and the End of Opaque Ad Delivery in Europe

What the regulation requires\n\nPlatforms must disclose, per impression, who paid and the main parameters used for targeting.\n\n## Operational impact\n\nPublishers now maintain a durable parameter log for every served creative. Retention is 12 months minimum.\n\n## Checklist\n\n- Parameter registry per placement\n- Immutable delivery log\n- User-facing disclosure endpoint