Bip39 Standard. Additionally, BIP39 defines the passphrase option, that adds a moderate amount of additive safety just in case your seed phrase is stolen or if not accidentally exposed. On the other hand, In addition, it adds some chance, so it is recommended For additional knowledgeable people. This comprehensive guidebook https://your-directory.com/listings13211227/bip39-seed-https-linktr-ee-bip39-bip39-passphrase-generator-fundamentals-explained