Bip39 Ian Coleman. The seed phrase is usually converted into a range that is utilised as the seed integer to some deterministic wallet that generates the many key pairs Employed in the wallet. Anyone else who discovers the phrase can steal the bitcoins, so it have to be stored safe https://phase2directory.com/listings13098579/bip39-seed-generator-https-linktr-ee-bip39-bip39-list-options