Even with caching, your WordPress site can be slow due to several factors: 1. Heavy Themes or Plugins: Some themes and plugins load unnecessary scripts or make excessive database queries, which can slow down rendering even if pages are cached. 2. Unoptimized Images: Large, uncompressed images can increase page load times. 3. External Scripts: Third-party scripts (like ads or analytics) can delay rendering. 4. Server Performance: If your hosting server is underpowered or not optimized for WordPress, it may struggle to handle requests efficiently. To fully optimize your site, consider auditing your theme, reducing plugin usage, compressing images, and using a reliable hosting provider.