Block top - The block selection and duration of the blockchain (in blocks) on development of the current block Nonce - The transaction variety for that from address (Remember this starts off at 0 so a nonce of a hundred would basically be the 101st transaction submitted by this account) https://toplistar.com/story22267669/what-does-eth-blockchain-explorer-mean-https-canvas-instructure-com-eportfolios-4028322-entries-14252553