Topic guide

Caching

Understand cache layers, preloading, invalidation and how WordPress caching fits together.

What Is WordPress Caching?

Caching stores reusable output so WordPress can do less repeated work when serving visitors.

Page cache and browser cache solve different performance problems. Understanding the difference helps avoid configuration confusion.

Preloading prepares cached content before the next real visitor requests it.

Object caching stores reusable query and application results. It solves a different problem from full-page caching.

Clearing cache is useful during changes and troubleshooting, but repeated full purges can create unnecessary work and cold-cache slowdowns.

When caching appears ineffective, verify response behavior, exclusions and purge rules before switching plugins.