Blockchain Explorer Overview https://output.jsbin.com/nisuteliyi/ So, if there is a large number of transactions in the mempool and you paid a comparatively reduced transaction price, your transaction can continue to be unconfirmed for an extended stretch of time due to the fact miners/validators will pick out transactions with better service fees https://bookmarkshq.com/story22511358/blockchain-explorer-mempool-the-ultimate-guide-to-explorer-blockchain-neo-https-cutt-ly-3rj9ygbc