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

Why this is correct:

Marketplace is a very powerful feature on DV360. This gives brands an options to negotiate and purchase quality inventory right from DV360 UI. It features premium publishers, programmatic guaranteed opportunities, and private marketplace (PMP) deals that cover both desktop, mobile web, and mobile in-app placements smoothly.

Why the other options are incorrect:

App-ads.txt: While app-ads.txt is an incredibly important security standard, it strictly protects mobile in-app (and Connected TV) inventory. Standard mobile web websites use regular ads.txt files.

Creative dimensions: Mobile web and mobile in-app environments often require different ad behaviors, technical formats (like MRAID for apps vs. standard HTML5 for web), and sizes due to how responsive coding behaves within an app framework vs. a web browser.

App collections: By definition, “App collections” are groups of mobile applications curated for targeting and are exclusively available for mobile in-app inventory, not mobile web.