The "image/jpeg" format is a widely used method for compressing digital images. It is particularly popular for photographs because it reduces file size while maintaining reasonable image quality. This compression works by removing some image data that the human eye is less likely to notice, making it efficient for storage and sharing. JPEG files typically have the file extension ".jpg" or ".jpeg" and can support a range of color depths. This format is commonly used on the web, in digital cameras, and for various applications, making it a standard choice for visual content across platforms like social media and websites.