WordPress Caching Explained: Page, Object and Browser Caching
Caching stores reusable work so WordPress does not have to regenerate or retransmit the same thing on every request.
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Work through the problem in order
- Page cache helps serve rendered pages quickly.
- Browser cache reduces repeat asset downloads.
- Object cache can reduce repeated database work.
- WooCommerce and personalized pages need more careful cache rules.
Where hosting enters the picture
Hosting matters because the platform controls server-side cache layers, resource limits and sometimes integrated object/CDN caching.
Do not optimize by superstition
Change one meaningful variable at a time, measure again, and keep a rollback path.