A content delivery network (CDN) serves your images, CSS and JavaScript from servers near your visitors.
Option 1: Cloudflare (simplest)
Put your whole domain behind Cloudflare (see How to set up Cloudflare). Static files are cached automatically with no WordPress changes.
Option 2: CDN URL with LiteSpeed Cache
If your CDN provides its own hostname (for example cdn.yourdomain.co.uk):
- Go to LiteSpeed Cache › CDN.
- Turn Use CDN Mapping on.
- Enter your CDN URL, including https://, and tick the file types to serve from it (images, CSS, JS).
- Save, then purge all caches.
Check it's working
View your page source or use browser developer tools (F12 › Network) to confirm static files load from the CDN address.