Glossary · Hosting and delivery
Cache
A stored reusable copy that can answer a request faster than recreating or retrieving the original resource again.
Also called: caching
Definition
Browsers, CDNs, servers, and applications can cache files or responses. Cache rules determine how long a copy remains fresh, when it must be revalidated, and how a new deployment replaces or bypasses the old version.
Why it matters
Caching can improve speed and reduce server work, but it can also make a correct update appear missing until the relevant copy expires or is invalidated.
Common misunderstanding
“Clear the cache” is not one universal action; several independent caches may exist between source and visitor.
Related terms
Related system family: Hosting & Release
Sources
- HTTP (opens in a new tab) · MDN Web Docs
- Cloudflare Pages limits (opens in a new tab) · Cloudflare Developers
Last reviewed July 16, 2026