A retailer is planning a seasonal promotion and needs to secure a specific number of impressions on a publisher's homepage during a holiday weekend. Which transaction model makes sure the advertiser has a committed volume of inventory at a locked-in price?

A fixed CPM plus a committed number of impressions maps to Programmatic Guaranteed in Display & Video 360 because it is a direct buy negotiated with the publisher. The proposal includes inventory and price up front, which is how the rate is locked before delivery begins. Google also documents a contracted quantity for Programmatic Guaranteed deals, which is the committed impression volume tied to the agreement. That combination of reserved inventory and negotiated pricing is what distinguishes it from non-guaranteed deal types. Google Help+1