Block height - The block quantity and length in the blockchain (in blocks) on development 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://bookmarkingalpha.com/story20497557/blockchain-explorer-usdt-trc20-fundamentals-explained-https-fletcher-odonnell-thoughtlanes-net-exploring-further-the-world-of-blockchain