Understand what the cache stores
Page cache stores rendered output, object cache may reduce repeated database work, and browser cache stores assets on visitor devices. Each layer has different settings and responsibilities.
Start with a simple configuration
Check hosting cache before adding another layer. Avoid overlapping plugins without understanding interactions, and test one setting at a time.
Exclude personal data
Review exclusions for login, account, cart, checkout and session-dependent pages. Test with two accounts and a private window to check that personal data is not shared.
Test updates and cache clearing
Edit a test page and confirm visitors see the change. For price or form updates, clear affected layers and test functions and performance, keeping a rollback configuration.
For help related to this guide, explore Website speed optimization
Reference: WordPress documentation
