Squid is a caching and forwarding HTTP web proxy. It has a wide variety of uses, including speeding up a web server by caching repeated requests, caching the World Wide Web (WWW), Domain Name System (DNS), and other network lookups for a group of people sharing network resources, and aiding security by filtering traffic. For more explanation on this video: https://www.linuxhelp.com/how-to-install-and-configure-squid-on-ubuntu-22-04