What are the recommended minimum image dimensions for Microsoft Audience Ads images?

The recommended minimum image dimensions for Microsoft Audience Ads images are 1200 x 628 pixels. This aspect ratio (approximately 1.91:1) is optimized for display across various placements within the Microsoft Audience Network, ensuring your ads appear clear and professional on different devices and screen sizes. While other dimensions like 300 x 250 are common for standard banner ads, they are not the primary recommendation for Microsoft Audience Ads, which often require larger, more visually engaging images to capture user attention within native content feeds. Images with incorrect aspect ratios, such as 628 x 1200 (portrait), may be cropped or scaled poorly, negatively impacting ad performance and appearance.