BIP39 stands for Bitcoin Advancement Proposal 39. The words are selected from a particular list of 2048 widespread English words which may be accustomed to the create a binary seed (your non-public key). This article describes BIP39, the standard that defines how seed phrases are made, and summarizes how BIP32 https://bookmarkfly.com/story19622111/new-step-by-step-map-for-bip39-english-words