Final answer:
The primary tool to confirm route payment for DSPs is RoutePay Confirm, which helps verify payments for ad inventory purchases and prevents fraud and discrepancies.
Step-by-step explanation:
The primary tool to confirm route payment for DSPs is RoutePay Confirm. It is a software tool that allows DSPs (Demand Side Platforms) to validate and verify payments for their ad inventory purchases. RoutePay Confirm helps DSPs ensure that they receive proper and accurate payment for the ad impressions they have bought from ad exchanges or publishers. It also helps prevent fraud and discrepancies in payment transactions, ensuring a smooth flow of payments in the digital advertising ecosystem. By using RoutePay Confirm, DSPs can have confidence in the financial aspect of their ad buying process, ensuring transparency and accountability in their transactions.