BIP39 stands for Bitcoin Advancement Proposal 39. The words are picked from a selected list of 2048 frequent English words that may be used to the generate a binary seed (your personal important). Stability: Everyone with your seed phrase can control your funds. Defend it securely and prevent sharing it. https://thebookpage.com/story4233349/new-step-by-step-map-for-bip39-english-words