Every time someone visits a WordPress page, the server normally builds that page from scratch — querying the database, loading PHP, assembling everything before sending it to the browser. Caching skips that process. It stores a ready-made version of the page so the server can deliver it immediately, without repeating all that work.
The result: pages load dramatically faster, and the server handles more visitors without slowing down.
Types of caching in WordPress
- Server-side (page) caching — The most impactful type. The full HTML of a page is saved and served directly, bypassing WordPress and the database entirely for cached requests. This is typically handled at the hosting level or via a caching layer on the server
- Browser caching — Instructs visitors’ browsers to store static assets (images, CSS, fonts) locally so they do not need to be downloaded again on repeat visits
- Object caching — Stores the results of database queries in memory so they do not need to be repeated on every page load. Useful for dynamic sites with a lot of content
Where caching should happen
The best caching is handled at the server level by your hosting provider — not bolted on as an afterthought. A good managed WordPress hosting setup includes server-side caching as standard. If you are relying solely on a plugin to handle all your caching, you are likely leaving performance on the table.
Caching is one part of the broader WordPress performance picture. Explore more in our performance knowledge base or book a checkup to see how your site is currently configured.