Why do the cache features require a LiteSpeed Server?
This plugin communicates with your LiteSpeed Web Server and its built-in page cache (LSCache) to deliver superior performance to your WordPress site. The plugin’s cache features indicate to the server that a page is cacheable and for how long, or they notify the server to purge particular cached pages using tags.
LSCache is a server-level cache, so it’s faster than PHP-level caches. Compare with other PHP-based caches.
LSCache is a page cache. A page cache allows the server to bypass PHP and database queries altogether. LSCache in particular, uses its server connection to remember things about the cache entries and to analyze dependencies. It uses tags to manage the smart purging of the cache, and it uses vary cookies to serve multiple versions of cached content based on criteria like device type, geographic location, and currency. These things are harder for non-server-based cache plugins to achieve, if they can do them at all.
If the LSCache plugin's capabilities sound complicated, no need to worry. LSCWP works right out of the box with default settings that are appropriate for most sites.
