Bip39 Checksum. Entropy values must be sourced from a strong source of randomness. What this means is flipping a fair coin, rolling a fair dice, noise measurements etc. Tend not to use phrases from guides, lyrics from tracks, your birthday or steet address, keyboard mashing, or nearly anything you think https://directoryserp.com/listings13083074/bip39-github-https-linktr-ee-bip39-the-ultimate-guide-to-bip39-vs-slip39