A blockchain is basically a digital record of transactions. The name comes from the fact that all those individual records, or blocks, are linked together in a single chain. Each transaction that is made in a blockchain is validated by multiple computers in the network, creating a secure peer-to-peer network to ensure each transaction is valid before it is added to the blockchain. Every new block is linked to the previous one: this ensures that the chain is never broken and that each block is permanently recorded. This decentralized network makes it impossible for a single system to add or manipulate invalid blocks to the chain. All those smart solutions within the blockchain technology make it the most secure and safe way to handle digital assets online, such as cryptocurrencies or NFTs.