A buyer ID is a unique identifier assigned to a specific buyer or advertiser in the digital advertising ecosystem. This identifier helps distinguish and track individual buyers or advertisers participating in various advertising transactions, such as programmatic advertising. Advertisers use Buyer IDs to streamline buying and selling ad inventory across various platforms, exchanges, and marketplaces. By using Buyer IDs, adtech platforms can efficiently manage bids, targeting, and reporting for different buyers, contributing to the overall effectiveness of digital advertising campaigns.

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