Block top - The block selection and duration of the blockchain (in blocks) on creation of the current block Nonce - The transaction quantity for the from address (bear in mind this starts at 0 so a nonce of 100 would really be the 101st transaction submitted by this account) https://get-social-now.com/story6134315/what-does-eth-blockchain-explorer-mean-https-www-demilked-com-author-brokerwhorl5