The term "Walrus" in the context of the documents you provided refers to a decentralized storage platform developed by Mysten Labs, which is a part of the Sui ecosystem. Walrus is designed to handle large-scale data storage needs that traditional blockchains cannot manage efficiently. It offers a cost-effective, scalable, and programmable storage solution, reinforcing Sui's position as a global coordination layer.

The Walrus platform is also associated with the WAL token, which plays a crucial role in powering the network through delegated proof-of-stake and ensuring reliable data storage via novel attestation challenges. Additionally, Walrus is used for storing media content, as demonstrated by Decrypt, a leading Web3 media outlet, which is posting its entire content library to Walrus.

For more detailed information, you can refer to the Walrus Whitepaper.