Design to provide a foundation for a decentralized internet of blockchains, also known as web3, Polkadot is an open-source sharded multichain protocol that connects and secures a network of specialized blockchains, facilitating cross-chain transfer of any data or asset types, not just tokens, thereby allowing blockchains to be interoperable with each other.
Is known as a layer-0 metaprotocol because it underlies and describes a format for a network of layer 1 blockchains known as parachains (parallel chains). As a metaprotocol, Polkadot is also capable of autonomously and forklessly updating its own codebase via on-chain governance according to the will of its token holder community.
For more information, please refer to Polkadot web page.
Applications on Ledger devices are critical for cryptocurrency holders in securely managing their crypto assets.