Block top - The block selection and duration of the blockchain (in blocks) on creation of the current block Nonce - The transaction quantity for your from address (Keep in mind this begins at 0 so a nonce of 100 would actually be the 101st transaction submitted by this account) https://socialmediastore.net/story21816137/what-does-blockchain-explorer-usdt-mean-https-diigo-com-010nvri