In the first place, Polkadot(DOT) is a cryptocurrency with a limited supply of coins. Additionally, Polkadot is an open-source project founded by the Web3 Foundation owned by Gavin Wood(also one of technical the founders of Ethereum). Web3 is a Swiss Foundation founded to facilitate a fully functional and user-friendly decentralized web. With Polkadot, which is a sharded protocol that enables blockchain networks to operate together they want to rebuild the modern internet. Also, Polkadot uses a DOT token that serves three distinct purposes: governance over the network, staking, and bonding.
In particular, Polkadot aims to enable a completely decentralized web where users are in control. In addition, Polkadot is built to connect private and consortium chains, public, and permissionless networks, oracles, and future technologies. Finally, Polkadot aims to facilitate an internet where independent blockchains can exchange information and transactions in a trustless way via the Polkadot relay chain. Polkadot aims to make it easier than ever to create and connect decentralized applications, services, and institutions.