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Within Display & Video 360, what statement about mobile in-app and mobile web inventory is correct?

Marketplace has premium inventory for both mobile web and mobile in-app inventory.

App collections are available for both mobile web and mobile in-app inventory.

App-ads.txt protects publishers and advertisers from fabricated mobile in-app and mobile web inventory.

Creative dimensions work for mobile web and mobile in-app inventory together.

Explanation

Analysis of Correct Answer(s)

  • The Marketplace in Display & Video 360 is a central hub where advertisers can discover premium inventory and negotiate deals directly with publishers. This functionality is available for a wide range of inventory types, including both mobile web (browser-based) and mobile in-app placements. Advertisers can find and secure high-quality ad opportunities across both environments through private marketplace (PMP) deals and programmatic guaranteed deals.

Analysis of Incorrect Options

  • Creative dimensions: While some ad dimensions like 300x250 are common to both, mobile in-app environments often use specific formats (e.g., full-screen interstitials, rewarded video) that are not standard on the mobile web. Therefore, creative dimensions do not universally work for both.
  • App-ads.txt: This is an IAB initiative designed to prevent ad fraud specifically for mobile in-app inventory. The equivalent standard for mobile web and desktop web is ads.txt. They are separate files for different environments.
  • App collections: This is a targeting feature that groups mobile apps into curated lists (e.g., "Top News Apps"). As the name suggests, it is exclusively available for targeting mobile in-app inventory and cannot be used for mobile web.