Polkadot is a blockchain protocol that links multiple blockchains into a unified network. It is designed to run on two types of blockchains. The main network is a relay chain, in which transactions are permanent, and user-created networks are known as parachains.

Parachains can be customized for various purposes and feed into the main blockchain, ensuring that parachain transactions are secure in the same way that main chain transactions are. Finally, it can process numerous transactions on several chains concurrently, avoiding constraints on older networks that handle transactions one at a time. This parallel processing capability boosts scalability and offers the ideal circumstances for further acceptance and growth.