Caching that is on from the first click, safe for your online-store, and measurable. Free on WordPress.org, page caching, browser caching, compression and lazy loading switch on at activation. Facebook, Google Ads and utm visitors get the cached page too. Logged-in users and carts never do. Pro adds image compression, optimised CSS delivery, delay JS, per-page unloading of unused CSS/JS, self-hosted Google Fonts, preloading, CDN, PageSpeed re-tests, and one-click revert of settings changes.