Block height - The block quantity and length in the blockchain (in blocks) on development of the present block Nonce - The transaction selection for that 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://ariabookmarks.com/story5984905/5-simple-statements-about-blockchain-explorer-solana-explained-https-urlscan-io-result-0199164a-7dbe-7737-944c-199699cc315c