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

This question tests your knowledge of the most common ad sizes available for the mobile in-app environment, which includes both smartphones and tablets. The correct option provides the most comprehensive and standard set of dimensions for this type of inventory.

Analysis of Correct Answer(s)

The correct combination represents the most frequently available ad slots for both mobile phone and tablet in-app placements:

• 320 x 50: A standard mobile banner, often called a "mobile leaderboard," typically appearing at the top or bottom of the screen.
• 300 x 250: The Medium Rectangle. This is one of the most popular ad sizes across all devices, including mobile in-app, due to its versatility.
• 320 x 480: A common full-screen interstitial size for smartphones in portrait orientation.
• 728 x 90: The Leaderboard banner, primarily available on tablets within an in-app environment.
• 768 x 1024: A standard full-screen interstitial size for tablets (e.g., an iPad in portrait mode).

This set covers the key banner and interstitial formats across the two primary mobile device types.

Analysis of Incorrect Options

The other options are incorrect because they include ad sizes that are either less common in mobile apps or are primarily designed for desktop environments:

• 120 x 600 and 160 x 600: These are "Skyscraper" ad units. Their tall, narrow format is designed for the sidebars of desktop websites and is extremely rare in mobile in-app inventory due to limited screen width.
• 336 x 280: This is the "Large Rectangle." While it is a valid IAB size, the 300 x 250 is significantly more common and has wider availability across mobile exchanges.