How can properly and effectively caching network images using a package like cached_network_image genuinely help meaningfully improve both your app's own overall performance and its actual data usage?

Without any effective caching mechanism in place, an app would otherwise need to wastefully redownload the exact same identical network image from over the internet every single time it is actually displayed again, even if that user had already viewed that exact same specific image just moments earlier, and cached_network_image automatically and properly stores previously downloaded images locally on the actual device, serving that same already cached image nearly instantly on any subsequent display request while also displaying a genuinely reasonable placeholder image during the brief initial loading period, meaningfully improving both your app's own perceived performance and also noticeably reducing a user's overall total mobile data consumption.

CachedNetworkImage(
  imageUrl: product.imageUrl,
  placeholder: (context, url) => CircularProgressIndicator(),
  errorWidget: (context, url, error) => Icon(Icons.error),
)