What is Polkadot (DOT)?
Polkadot (DOT) is a network protocol that lets independent blockchains communicate directly. Launched in 2020, it allows each chain to operate under its own rules while benefiting from a shared security layer. This design removes the need for external bridges when transferring data or assets between chains.
What purpose does the DOT token serve?
DOT plays three key roles in the network. First, it gives holders a voice in governance. Protocol upgrades, fee adjustments, and other decisions are made through on-chain votes, allowing the network to evolve without hard forks.
Second, DOT is staked to secure the network. Users lock their tokens to back validators and earn rewards in return. The third function involves network expansion: projects that want to connect a new chain to Polkadot must lock DOT for the duration of a lease. The locked tokens remain frozen throughout the period and are released when the lease ends.
Who keeps the Polkadot network secure?
A central chain, called the Relay Chain, provides shared security for the entire ecosystem. Independent parachains connect to it, process their own transactions in parallel, and inherit the Relay Chain’s protections.
Polkadot uses a Nominated Proof-of-Stake (NPoS) mechanism. Validators confirm transactions and produce blocks, while nominators stake DOT to support the validators they trust. This two-role system raises the cost of attacks and rewards participants for contributing to network security. The project was spearheaded by Ethereum co-founder Gavin Wood and is backed by the Web3 Foundation.
