BIP39 means Bitcoin Advancement Proposal 39. The words are chosen from a particular list of 2048 popular English words that may be used to the crank out a binary seed (your personal essential). This additional complexity boosts the risk of misplacing the passphrase, and therefore getting rid of your copyright. https://socialeweb.com/story4878693/bip39-seed-phrase-mnemonics-generator-an-overview