This page describes what the Subscan Block Explorer is
Blockchain ecosystems typically have a service that indexes the blocks of the chain and presents the information read from the blocks in a readable and searchable manner. This kind of service is called Block Explorer, and the main goal for such tools is to provide observability on what's happening on the chain.
In the Substrate ecosystem, the most advanced Block Explorer is called Subscan.
Subscan supports indexing the Humanode network. Use the link below to see the Humanode page on Subscan.