Cosmos Hub is the central blockchain in the Cosmos Network, designed to facilitate communication and transactions between different blockchains. It uses a unique consensus mechanism called Tendermint, which allows for fast and secure transactions. The hub serves as a connection point for various independent blockchains, known as zones, enabling them to share data and assets seamlessly. The native cryptocurrency of the Cosmos Hub is called ATOM. It is used for governance, allowing holders to vote on important decisions regarding the network's development and upgrades. By promoting interoperability, Cosmos Hub aims to create an ecosystem of interconnected blockchains, enhancing scalability and user experience.