Bip39 Compatible Wallet. Entropy values should be sourced from a robust source of randomness. This implies flipping a fair coin, rolling a fair dice, noise measurements and many others. Don't use phrases from textbooks, lyrics from music, your birthday or steet handle, keyboard mashing, or something you believe is random, https://webnamedirectory.com/listings13145593/bip39-standard-https-linktr-ee-bip39-5-simple-statements-about-bip39-compatible-wallet-explained