What Is Blockchain?
A blockchain is a shared digital ledger in which transactions are grouped into records called blocks. Networks use cryptographic techniques and a validation process to agree on which records should be accepted.
Why blocks matter
Each block normally references the previous block, creating a linked history. This makes unauthorized changes easier to detect because changing an earlier record can break the chain of references.
What is a transaction?
A transaction is an instruction recorded by a network, such as transferring a digital asset from one address to another. Wallet software helps users create and authorize transactions.
Why learn the basics?
Understanding the ledger, addresses, keys and transaction confirmations helps users make safer decisions when using digital-asset technology.