Polcadot is a decentralized Web3 platform created with the aim of uniting various private and public networks, oracles and other technological solutions. Independent blockchains will be able to exchange information and transactions through the Polkadot relay chain. The ecosystem makes it easier to develop and connect decentralized applications and services. DOT token is used to rule the network. In addition, a reward system has been developed, according to which active and useful participants are rewarded with tokens, while passive ones lose their share in the network. DOT token is used to add and remove blockchains.