What is Rococo Relay Chain (Kusama)?

The Rococo Relay Chain is the main blockchain built to run Kusama, and is designed to act as the control center behind the Kusama ecosystem. Rococo was built to facilitate the transfer of independent parachains to the Polkadot Relay Chain, as well as to aid in the operation of distinct parachains that might choose to build on Kusama long-term. Rococo's main objectives are to provide cross-chain interoperability and communication among both internal parachains and external blockchain networks, and to serve as a testing ground for parachain optimization and deployment.