What page caching actually does
A page cache keeps a reusable HTML response so the server can answer eligible requests without rebuilding the page each time. WordPress describes caching as a way to reduce processing work. It also notes that dynamic content makes configuration more complex.
Map your visitor journeys first
Our suggested starting point is a small list: home, article, archive, product, cart, checkout and account. Mark which pages are public and which contain visitor-specific information. Check your hosting and caching documentation before choosing exclusions; route names alone do not describe every personalized experience.
Test the result, not just the setting
Open a fresh private browsing session and compare it with a signed-in session. Change a public article, clear the relevant cache and verify the new text appears. For a store, use a test payment environment to check that two separate sessions keep their own carts. These are practical checks, not proof that every integration is covered.
Keep a record
Write down the cache layers in use, who controls them and how to purge each one. A simple change log makes stale content easier to investigate. Start with one representative page and a repeatable baseline instead of enabling every optimization at once.
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