Block height - The block amount and size on the blockchain (in blocks) on generation of the present block Nonce - The transaction selection with the from address (bear in mind this starts at 0 so a nonce of 100 would actually be the 101st transaction submitted by this account) https://iwanttobookmark.com/story20819499/the-greatest-guide-to-blockchain-explorer-unconfirmed-transaction-https-mathiasen-curry-2-federatedjournals-com-diving-deep-blockchain-explorers