A guide on installing and setting up Varnish Cache with Apache on Ubuntu 22.04 was made available by Howtoforge.

How to Install and Configure Varnish with Apache on Ubuntu 22.04

Varnish Cache is a high-performance HTTP accelerator designed for high-traffic dynamic websites. It acts as a middleman between your client and server, handling all inbound requests before they land on your web server's backend. Varnish caches a copy of each web page served by the web server. When a user requests a cached page, Varnish serves the cached copy instead of requesting the same page again and again from the backend server. It makes the Full Page Cache by Varnish so ideal for stores with high-traffic stores and thousands of products.

How to Install and Configure Varnish with Apache on Ubuntu 22.04