The web server answers every page request. On hosting panels the usual comparison is Apache, Nginx, and LiteSpeed.
Apache
Ubiquitous and .htaccess-friendly. Fine for many workloads, but busy PHP shared hosts often outgrow default Apache performance without careful tuning and caching layers.
Nginx
Excellent reverse proxy and static file server. Common in custom stacks. On classic cPanel shared hosting, operators sometimes pair Nginx in front of Apache (or use panel-specific Nginx integrations) rather than replacing the whole panel model overnight.
LiteSpeed
Drop-in friendly for many cPanel environments, strong PHP performance, and LSCache for WordPress-heavy estates. For hosts selling “fast WordPress hosting,” LiteSpeed is frequently the clearest upgrade path.
When to buy LiteSpeed
If PHP sites dominate and support tickets mention “slow TTFB,” benchmark before/after with caching enabled. A shared LiteSpeed license makes the economics easier than retail when you run multiple nodes.