Block top - The block selection and duration of your blockchain (in blocks) on creation of the current block Nonce - The transaction quantity for your from address (bear in mind this begins at 0 so a nonce of 100 would truly be the 101st transaction submitted by this account) https://socialwoot.com/story22330446/what-does-eth-blockchain-explorer-mean-https-peatix-com-user-27717689