Cosmos is a decentralized network of independent, scalable, and interoperable blockchains, aiming to create an "Internet of Blockchains."  It addresses scalability and interoperability challenges in blockchain technology. Key components include the Cosmos SDK for building custom blockchains, the Tendermint consensus algorithm for security and performance, and the Inter-Blockchain Communication (IBC) protocol for seamless interaction between blockchains.  The native token, ATOM, is used for network governance and staking. Cosmos hosts a variety of projects, contributing to a diverse and dynamic ecosystem.