For an optimised, pleasant end-user experience in the Commerce portal, please ensure that images are displayed in the right formats and sizes, as recommended below. 

Image File Type and Size

• Recommended Image File Types: .jpg, .gif, .png & .jpeg
• Recommended Image File Size: 70kB or less

Image Dimensions

• Recommended for the Product Detail page: minimum of 1000 pixels (per side)
  (See "Process Overview: Product Details" for more information)
• Recommended for the Login and Landing Pages Banners: 3840 pixels by 2160 pixels
  (See "Commerce Administration: Login, Landing Page Banners, Product Filters" for more information)