An advertiser wants to reserve premium inventory on a major streaming service with a fixed CPM and assured impressions. Which one of the following assures the publisher can't reallocate the placement to another buyer?

Programmatic Guaranteed is the only deal type here built around guaranteed inventory and a negotiated direct buy with the publisher. Google’s Display & Video 360 Help describes it as a direct buy and references the contracted quantity of impressions, which matches a fixed CPM with assured delivery. By contrast, Display & Video 360 classifies Preferred Deal as a non-guaranteed fixed deal and Private auction as non-guaranteed auction inventory, so those do not reserve impressions exclusively for one buyer. A package also does not create a guarantee, because Google defines packages as collections of non-guaranteed inventory. Google Help+3Google Help+3Google Help+3