Quick answer
Redis is most valuable on dynamic WordPress workloads where full-page cache cannot satisfy every request.
Where it helps
WooCommerce, memberships, LMS, busy admin dashboards and other database-heavy workloads can benefit because personalized pages still execute WordPress.
Where it is not magic
A slow uncached query, inefficient plugin or undersized PHP worker pool may remain slow even with object cache.
Test correctness
Caching bugs can appear as stale personalized data or unexpected application behavior. Validate login, cart, checkout and account workflows after changes.
Where Cloudways enters the decision
Cloudways currently integrates Redis and Object Cache Pro into supported WordPress configurations, making it relevant to buyers with dynamic workloads.