BIP39 means Bitcoin Advancement Proposal 39. The words are picked from a particular list of 2048 widespread English words that may be accustomed to the generate a binary seed (your private essential). Standard recovery phrases use a selected list of 2048 words next the BIP39 standard (Bitcoin Improvement Proposal 39). https://socialbaskets.com/story5064363/the-definitive-guide-to-bip39-seed-phrase