Block height - The block variety and duration of your blockchain (in blocks) on generation of the present block Nonce - The transaction number for your from address (bear in mind this begins at 0 so a nonce of 100 would really be the 101st transaction submitted by this account) https://thegreatbookmark.com/story20254272/the-greatest-guide-to-blockchain-explorer-unconfirmed-transaction-https-md-swk-web-com-onnbpblstmy8giqdrhnkga