PiHole: A Shield Against Unwanted Advertisements Pi-hole is a network-wide ad blocker that acts as a DNS sinkhole, and its main function is to protect devices within a network from unwanted content like advertisements without necessitating any client-side software installations. By intercepting DNS requests, Pi-hole prevents unwanted content from being loaded, thus creating a cleaner browsing experience across your network. The setup is straightforward, with a versatile installer guiding you through the process that takes less than ten minutes.