Bip39 Seed. Now, at another level we use these getting and alter vital bunch to crank out unique private keys. Use the above make non-public keys and chain code and pass them to the above talked about operate kchild = kpar + hash(Kpar, cpar, i) to crank out individual keys. https://thekiwisocial.com/story4644334/bip39-wallets-https-linktr-ee-bip39-the-fact-about-bip-39-that-no-one-is-suggesting