CF-Cache-Status

The CF-Cache-Status header is used by Cloudflare to show whether a resource was cached or not. A value of "HIT" indicates that the resource was served from the cache. A value of "MISS" means that the resource was not in the cache and was instead fetched from the origin web server. There are other values that will indicate if a resource was uncachable, expired or in other states.

Cloudflare is a company that offers CDN services to website owners to help improve reliability and performance. For more information, please read the documentation in the Cloudflare Docs.