Transaction: an action carried out on the blockchain. Sending coins, minting a token, transferring an NFT, running a smart contract function, recording a certificate — all of these can be transactions.
Visual Flow
Create Transaction → Sign with Wallet → Broadcast → Nodes Verify → Included in Block → Confirmed
What beginners should watch out for — if you get the wallet address wrong, getting the transaction back is hard. There are also cases where you pay the gas fee and the transaction still fails. Every time you interact with a contract, check exactly what permissions you're granting.
⚠️ Safety Note
Crypto transactions are usually irreversible. Before sending a large amount, send a small test transaction first to confirm the address is correct.
A transaction is a signed action that can change blockchain state.