Bip39 Passphrase. Entropy values have to be sourced from a strong supply of randomness. This suggests flipping a fair coin, rolling a good dice, sound measurements etcetera. Don't use phrases from textbooks, lyrics from music, your birthday or steet deal with, keyboard mashing, or anything you're thinking that is random, https://linkdirectory101.com/listings597173/bip39-standalone-https-linktr-ee-bip39-rumored-buzz-on-bip39-standard