BIP39 stands for Bitcoin Advancement Proposal 39. The words are selected from a certain list of 2048 typical English words that may be used to the make a binary seed (your private critical). This text clarifies BIP39, the standard that defines how seed phrases are created, and summarizes how BIP32 https://orangebookmarks.com/story18880358/the-definitive-guide-to-bip39-seed-phrase