Object Cache Pro uses Redis-backed object caching to reduce repeated database work in WordPress; it complements page caching rather than replacing it.
Object cache targets repeated database work
WordPress frequently reconstructs the same objects and query results. Persisting them in memory can reduce database load, especially on dynamic or logged-in workloads.
It matters where full-page cache cannot help
WooCommerce carts, accounts, LMS dashboards and admin activity contain personalized work. Object caching can help those requests even when full HTML pages should not be cached.
Cache correctness matters more than cache quantity
Plugins and custom code can make invalid cache assumptions. Test checkout, login, personalization and admin workflows after enabling or changing object-cache behavior.
Decision takeaway
Use Redis/Object Cache Pro as one layer of a strategy that also considers full-page cache, CDN/edge cache and the uncached application path.