WordPress Caching Explained
Caching makes WordPress faster by reusing work that would otherwise have to be repeated.
Updated September 9, 2026
Full-page cache
A full-page cache stores a finished response so anonymous visitors do not require WordPress and the database to rebuild the page each time. It is often the biggest server-side performance win for content sites.
Object cache
Persistent object caching stores frequently reused data objects so WordPress can avoid repeating database work. Redis is a common backend, but object caching helps most when the workload actually repeats cacheable queries.
Browser and edge cache
Browsers can reuse local static assets, while a CDN can cache content closer to visitors. Cache rules must respect dynamic pages, cookies and personalized content.
Invalidation is the hard part
A cache that never refreshes is fast but wrong. Good hosting and caching tools make purging predictable when content, code or configuration changes.
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