Bip39 Last Word Checksum. The seed phrase acts for a backup of the wallet and can be utilized to revive the wallet and access the resources in the event of decline or damage to the initial wallet. During the online video below you may check out the seed stamping process https://emilioalwit.homewikia.com/11068941/the_anatomy_of_a_bip39_phrase_entropy_words_and_stability