BIP39 means Bitcoin Improvement Proposal 39. The words are picked from a certain list of 2048 typical English words that may be utilized to the deliver a binary seed (your personal important). Standard recovery phrases use a selected list of 2048 words subsequent the BIP39 standard (Bitcoin Enhancement Proposal 39). https://bookmarkingalpha.com/story19151267/helping-the-others-realize-the-advantages-of-bip39-mnemonic-phrase-tool