#explain-card In the context of blockchain, a [[Block|block]] refers to a collection of transactional data or information bundled together in a predetermined size. Once verified through [[Consensus|consensus]] rules or protocols, the information within a block is added to the blockchain, becoming a permanent part of it. Each block is linked to the previous one through cryptographic hashes, forming a chain of blocks, hence the name "blockchain." This structure ensures the integrity and immutability of the data.