What creative dimensions are frequently available for mobile in-app inventory in Display & Video 360?

In the context of mobile in-app inventory in Display & Video 360, the dimensions 320 x 50, 320 x 480, 300 x 250, 728 x 90, and 768 x 1024 are frequently available because they cover the most critical ad placements for both smartphones and tablets. Specifically, 320 x 50 serves as the standard mobile leaderboard, while 300 x 250 (medium rectangle) is a highly versatile format found in both apps and mobile web content. For full-screen experiences, 320 x 480 is the primary interstitial size for smartphones, and 768 x 1024 provides the equivalent portrait interstitial for tablets. Finally, 728 x 90 allows your campaign to scale across tablet leaderboards, ensuring that your creative assets can serve on a wide variety of premium in-app inventory without being filtered out due to sizing mismatches.