Bip39 format https://rylanmecp341.wpsuo.com/bip32-vs-bip39-which-is-better-for-your-copyright-demands Regardless that it makes use of BIP32 approach you are able to still import BIP39 seeds into Electrum wallet. Also in addition to BIp32 There's BIP44 Model which some wallet use with the generation of seeds. BIP32 and BIP44 operate collectively to add overall flexibility, privateness,... https://socialmarkz.com/story10370869/bip39-bitcoin-wallet-5-essential-elements-for-bip39-word-list-pdf-https-www-youtube-com-channel-ucupxfytj0fb78sq55hu6ocw