BIP39 stands for Bitcoin Improvement Proposal 39. The words are selected from a particular list of 2048 widespread English words which can be accustomed to the produce a binary seed (your private critical). This additional complexity enhances the possibility of misplacing the passphrase, and so getting rid of your copyright. https://yoursocialpeople.com/story4172628/not-known-factual-statements-about-bip39-explained