Block height - The block quantity and size on the blockchain (in blocks) on development of the present block Nonce - The transaction selection for the from address (bear in mind this starts at 0 so a nonce of 100 would truly be the a hundred and first transaction submitted https://bookmarktune.com/story20569470/what-does-eth-blockchain-explorer-mean-https-www-instapaper-com-p-16864836