BIP39 means Bitcoin Advancement Proposal 39. The words are chosen from a selected list of 2048 widespread English words which can be used to the generate a binary seed (your private key). Standard recovery phrases use a selected list of 2048 words next the BIP39 standard (Bitcoin Improvement Proposal 39). https://hotbookmarkings.com/story19486411/5-simple-techniques-for-bip39-seed-phrase