True or false? Auction buying is unguaranteed buying.

True. Auction buying, also known as programmatic bidding, is inherently unguaranteed. Advertisers bid for ad impressions in real-time, and the highest bidder wins the impression. This means there's no guarantee that a specific ad will be shown or that a certain number of impressions will be delivered, as it depends on competition and bid prices. False is incorrect because the nature of an auction is competitive and real-time, making outcomes uncertain. Guaranteed buying, in contrast, involves pre-negotiated terms for a fixed number of impressions at a set price, typically through direct deals.