Bip39 Seed. Entropy values should be sourced from a robust supply of randomness. What this means is flipping a good coin, rolling a good dice, sounds measurements etc. Don't use phrases from textbooks, lyrics from tracks, your birthday or steet deal with, keyboard mashing, or anything you think is random, https://new-webdirectory.com/listings13089747/bip39-word-list-numbers-https-linktr-ee-bip39-what-does-bip39-mnemonic-code-converter-tool-mean