Blockchains are immutable ledgers of data that are distributed across several nodes, making them decentralized and secure. Every node in the network has a copy of the blockchain, and any changes to the data must be approved by the majority of the nodes before it can be added to the chain. This makes it virtually impossible to tamper with the data or falsify transactions.

Blockchain technology is primarily associated with cryptocurrencies like Bitcoin, but its potential applications go far beyond just financial transactions. It can also be used