LiteSpeed Cache is one of the most effective plugins for speeding up WordPress sites. It uses server cache, resource optimization, and other techniques to improve performance and SEO.

The main features of LiteSpeed Cache are

1. Page caching

Server caching

LiteSpeed Cache uses a server-side caching layer that significantly reduces page load times and server load. As a result, websites load faster, which has a positive impact on user experience and SEO.

Caching objects and databases

• Use Memcached or Redis to cache database requests.
• Reduces the number of database calls, which improves website performance.
• Optimization of SQL queries to speed up information processing.

Browser caching

• Using the local browser cache to reduce the load on the server.
• Reducing the loading time of repeated visits to the site.

2. Optimization of images and resources

Image optimization

• Automatic image compression without loss of quality.
• Convert images to WebP format to reduce file size.
• Lazy Load, which delays the loading of images until the user views them.

Minify and merge CSS/JS

• Removes extra spaces, comments, and unnecessary code from CSS and JavaScript files.
• Combining CSS and JavaScript files to reduce the number of HTTP requests.
• Loading important CSS first, which speeds up page rendering.

Delayed JavaScript loading

• Delayed loading of JS files until the user interacts with the page.
• Improves the speed of the first content display.

3. Control over caching and cache clearing

Caching of mobile versions

• Separate cached versions of the site for mobile devices.
• Ensure optimal performance on different screens.

Automatic cache clearing

• Clearing the cache after updating records, pages, or changing site settings.
• Flexible cache flushing rules for different types of content.

4. Multi-level caching

Edge Side Includes (ESI)

• Allows you to cache static and dynamic content separately.
• It is especially useful for sites with personalized content, such as online stores and sites with user authorization.

5. Integration with CDNs

LiteSpeed Cache supports integration with Cloudflare, QUIC.cloud, and other CDN services, which allows you to further reduce page load times by distributing content across global servers.

6. Core Web Vitals improvements

The plugin affects the following SEO metrics:

• Largest Contentful Paint (LCP) – speeds up the loading of the main content on the page.
• First Input Delay (FID ) – reduces the time until the first user interaction with the page.
• Cumulative Layout Shift (CLS) – stabilizes page elements during loading, preventing them from shifting.

7. Additional optimizations

Database

• Automatic cleaning of old posts, spam comments, temporary records.
• Optimizes database tables to improve performance.

Heartbeat Control

• Manage the frequency of WordPress Heartbeat API requests.
• Reduces server resource utilization for the administrative panel.

Free and paid versions of LiteSpeed Cache

Features of the free version:

• Basic page caching.
• Image optimization.
• Minimizing and combining CSS/JS.
• Lazy image loading.
• Integration with Cloudflare.
• Database cleaning.

Additional features of the premium version:

• Advanced caching via QUIC.cloud CDN.
• Optimization of critical CSS.
• Improved support for CDN services.
• Dynamic ESI caching for personalized content.
• Premium support and ad-free updates.
• Automatic tracking of content changes and real-time cache updates.

Conclusion

LiteSpeed Cache is a powerful tool for improving the performance of WordPress sites. Thanks to server caching, resource optimization, and support for modern technologies, this plugin significantly improves page loading speed, which has a positive impact on SEO and user experience. The choice between the free and premium versions depends on the needs of the site: the basic functions are enough for most users, and the advanced features are suitable for large and high-load projects.

The official page of the plugin is https://uk.wordpress.org/plugins/litespeed-cache/