Polkadot is a blockchain for scalable decentralized computation and interoperability. What is a Polkadot parachain? A parachain is an application-specific data structure that is globally coherent and validatable by the validators of the Polkadot Relay Chain. Due to their parallel nature, they are able to parallelize transaction processing and achieve scalability of the Polkadot system. They share in the security of the entire Polkadot network and can communicate with other parachains. $DOT tokens must be bonded to acquire a parachain slot, thus parachains have value at stake and attaching a useless chain is expensive. What are the parachains of Polkadot? What’s their value? Check them in this playlist now!