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Blockchain is a system of recording information in a way that makes it difficult or impossible to change, hack, or cheat the system. A blockchain is essentially a digital ledger of transactions that is duplicated and distributed across the entire network of computer systems on the blockchain. Each block in the chain contains a number of transactions, and every time a new transaction occurs on the blockchain, a record of that transaction is added to every participant’s ledger. The decentralised database managed by multiple participants is known as Distributed Ledger Technology (DLT). Blockchain is a type of DLT in which transactions are recorded with an immutable cryptographic signature called a hash. Polygon is a “layer two” or “sidechain” scaling solution that runs alongside the Ethereum blockchain — allowing for speedy transactions and low fees. MATIC is the network’s native cryptocurrency, which is used for fees, staking, and more. It acts as a speedy parallel blockchain running alongside the main Ethereum blockchain. To use it, you can “bridge” some of your crypto over to Polygon, and then interact with a wide range of popular crypto apps that were once exclusive to the main Ethereum blockchain. Currently, Ethereum can process 14 transactions per second (TPS)—while Polygon achieves speeds of up to 7,000 TPS. This makes everything built on the blockchain much cheaper and quicker, like an HOV lane on the highway. Smart contracts were first proposed in 1994 by Nick Szabo, an American computer scientist who invented a virtual currency called "Bit Gold". decentralized blockchain network. The code controls the execution, and transactions are trackable and irreversible. A smart contract is a self-executing contract with the terms of the agreement between buyer and seller being directly written into lines of code. The code and the agreements contained therein exist across a distributed, Smart contracts permit trusted transactions and agreements to be carried.