An Animated PNG (APNG) is a file format that allows for animated images, similar to a GIF but with better quality. It supports 24-bit color and 8-bit transparency, making it ideal for images with complex colors and smooth edges. APNG files can contain multiple frames, which are displayed in sequence to create the animation. Unlike traditional PNG files, which are static, APNGs can loop their animations and provide a more vibrant visual experience. This format is widely used on the web, especially in applications where high-quality graphics are essential, such as in web design and social media.