一間零售公司必須為應用程式廣告活動上傳廣告素材資源。請問應用程式廣告活動支援哪些長寬比的圖片素材資源？

Google Ads App campaigns support image assets with aspect ratios of 1:1 (square), 1.91:1 (landscape), and 4:5 (portrait). These diverse ratios allow your ads to display effectively across various placements and devices, maximizing reach and visual appeal. Options that only include 1:1 and 1.91:1 are incomplete as they omit the 4:5 portrait format. The option including 1.75:1 is incorrect because 1.75:1 is not a standard supported aspect ratio for image assets in App campaigns; 1.91:1 is the correct landscape ratio.