Blockchain is an immutable digital ledger that enables secure transactions across a peer-to-peer network. It records, stores and verifies data using decentralized techniques to eliminate the need for third parties, like banks or governments.
Blockchain technology is a decentralized digital ledger that records transactions across multiple computers in a way that ensures security, transparency, and immutability. Each transaction is grouped into a block linked to the previous one, forming a chain.
On a blockchain, transactions are recorded chronologically, forming an immutable chain, and can be more or less private or anonymous depending on how the technology is implemented. The ledger is distributed across many participants in the network — it doesn’t exist in one place.