Bip39 Checksum. A mnemonic phrase, mnemonic recovery phrase or bitcoin seed can be a list of words which retail store all the information necessary to recover a bitcoin wallet. A wallet will commonly generate a mnemonic backup phrase and instruct the user to write it down on paper. I've read https://thebookmarkid.com/story18829351/bip39-words-https-linktr-ee-bip39-bip39-wallets-things-to-know-before-you-buy