Block height - The block amount and size with the blockchain (in blocks) on generation of the present block Nonce - The transaction number for your 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://bookmarklayer.com/story20294545/detailed-notes-on-blockchain-explorer-unconfirmed-transaction-https-doc-adminforge-de-xbqatr5jtxomaazj2qoagg