Definition
A seed phrase, also called a recovery phrase or mnemonic, represents wallet recovery information in a human-readable form. BIP39 is a common standard, often encountered as 12 or 24 words, but other lengths and backup standards exist. The phrase is not simply the password for a website and is not necessarily one individual private key.
How It Works
In BIP39, software generates random data, includes a checksum and converts the result into words from a defined list. The mnemonic and any optional passphrase are then used to derive a binary seed. Wallets derive accounts from that seed using compatible rules. Restoring the same words may still require the correct passphrase, account paths and supported network to display the expected assets.
Key Considerations
Record the exact words in their original order and protect them from copying, loss and damage. Never invent a phrase or translate its words into another language: that can create different recovery data. Do not enter it into unsolicited websites or messages claiming to verify ownership. Someone with the required phrase and passphrase can generally restore the wallet elsewhere. A valid checksum helps detect some transcription mistakes, but it neither proves a phrase is safely generated nor automatically corrects every error.