Definition
A record of the transfer of cryptocurrency from one address to another, broadcast to the network, validated by nodes or miners/validators, and permanently recorded on the blockchain.
Why It Matters
Every action in crypto — buying, selling, sending, swapping — is a transaction. Understanding how they work, how they're confirmed, and how to verify them is fundamental.
Example
Sending 0.5 ETH from your MetaMask to a friend's wallet creates a transaction that is broadcast, validated, and permanently recorded on Ethereum.
Related Terms
Block
Gas Fee
Confirmation
Block Explorer